Journal of Industrial Design and Engineering Graphics 2019-05-22T17:54:35+00:00 Ionel SIMION Open Journal Systems <p>The Journal of Industrial Design and Engineering Graphics is a peer-reviewed, open access journal&nbsp; available in printed and electronic versions published by Romanian Society of Engineering Graphics.</p> THEORETICAL CONSIDERATIONS REGARDING THE CONSTRUCTION OF TETRAHEDRON 2019-05-22T17:53:50+00:00 Monica BALCAU Andrei KIRALY Liviu SCURTU Calin PRODAN <p>The paper presents an analytical study on different theoretical aspects regarding the construction of the tetrahedron. It covers some of the particular construction cases which use descriptive geometry methods. Starting from these cases, one can also construct other particular cases. The matter seems simple enough, yet some of the cases require more complex solutions.</p> 2019-06-02T00:00:00+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE STUDY OF TANGENCY TO CONICAL SURFACES 2019-05-22T17:54:35+00:00 Sanda BODEA <p>This paper aims to study the problem of tangency of straight lines and planes, with application at conical surfaces. With the help of descriptive geometry knowledge, the plane and straight lines tangent to the conical surfaces are being determined, respecting the special conditions imposed.</p> 2019-05-10T16:28:34+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics GRAPHICAL AND ANALYTICAL APPROACH ON CYLINDRICAL – CONICAL INTERSECTIONS 2019-05-22T17:54:34+00:00 Vanda - Ligia DANAILA Alina – Angelica ANGHEL <p>The cylindrical – conical intersections are often met in technique as parts of pipes, tanks, bends etc. The paper work proposes a comparison between methods to solve the cylindrical – conical intersection problems. The problems may be solved either applying graphical, descriptive geometry methods or using analytical methods. The graphical method uses a certain number of points to find the intersection curves and the development of the solids, the analytical method uses a complex enough mathematical apparatus.</p> 2019-05-10T16:44:29+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics ASPECTS AND GEOMETRIC INTERPRETATION IN SOLVING CONICAL SECTIONS 2019-05-22T17:54:33+00:00 Alina DUTA Ionut - Daniel GEONEA Gordana DJUKANOVIC Marcela POPESCU Ludmila SASS <p>In mathematics, a conic is the curve that is obtained by intersecting a plane with a cone. Is well known that the shape of this curve may differ quite a bit depending on the position of the intersection plane relative to the cone axis, as it is actually a family of curves, commonly called "conical". In the first part, we determine the relation between the shape of the section curve and the angle of the plane of the section plane. The paper also proposes a reassembly of the cone from the fragments resulting from the sectioning with different planes. These recommences can be found as technical solutions for joining two pipes with different diameters and whose axes are not coaxial.</p> 2019-05-10T17:05:26+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics A STUDY OF APPROXIMATE DEVELOPMENT OF SPHERICAL SURFACES 2019-05-22T17:54:32+00:00 Liliana LUCA <p>An interesting problem in descriptive geometry is the unfolding of the non-developable surfaces of revolution. In this paper we start from the two classic methods of approximate development of a sphere: the gore method and the zone method. For each of the two methods, we study the errors of approximation. It is considered an approximate development of sphere using gore method, in 3 variants, using successively: 4 meridian (vertical) planes (resulting 8 gores), 5 meridian planes (10 gores) and 6 meridian planes (12 gores). Also for the same sphere, the approximate development is obtained using successively: 7 level planes (resulting 8 zones), 9 level planes (10 zones) and 11 level planes (12 zones). For every variant of development, the error is calculated by comparing the area of approximate development and the theoretical area of the sphere. A computerized method based on Maple procedures is used. In the paper there is also a comparison between the errors of the two methods (gore method and zone method).</p> 2019-05-10T17:17:32+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics COMPLEX HEAT EXCHANGERS – THE COMBINATION OF FRACTAL GEOMETRY AND ADDITIVE MANUFACTURING 2019-05-22T17:54:32+00:00 Kevin NOACK Martin Friedrich EICHENAUER, Daniel LORDICK <p>Complex structures for heat exchangers in high-temperature applications are developed in the research project instaf. The driving force behind these developments is the new design freedom given by the additive manufacturing (AM) of ceramics. With this technology, the complexity of form is no longer an obstacle for profitable solutions. The application of fractals in this context is very promising, since it takes advantage of the new freedom while on the other hand the algorithms for the generation of such forms are relatively easy to handle. This paper presents some proposals for heat exchangers or mixing structures, which are inspired by natural formations. The underlying assumption is: the efficiency of a heat exchanger increases with the surface area of the wall between the fluids. The surfaces here are derived from a series of fractal curves within a given outer shape. The algorithms for the curves use the Lindemayer system (Lsystem), which allows for steering a large variety of curves systematically.</p> 2019-05-10T17:38:17+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics SPECIFYING A PLANE BY USING OF THE DIHEDRAL ANGLE 2019-05-22T17:54:31+00:00 Liviu PRUNA Andrei SLONOVSCHI <p>Sometimes, in the drawing's process of a part, it is necessary to be determine a plane by using the value of the dihedral angle between this and another plane, which is already known. The authors did not find in the literature solutions for this problem, but they observed that can be easily found only methods for measuring of the dihedral angle. Starting from these considerations, in this paper, the authors propose two solutions for specifying a plane by using the dihedral angle, then compares them and recommend one of the two. Finally, the authors present the solutions offered for this problem by the computer programs when 3D model is used.</p> 2019-05-10T17:52:16+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE SIMPLIFIED ROTATION METHOD 2019-05-22T17:54:30+00:00 Liliana TOCARIU <p>The simplified rotation method derives from the classic rotation method included in the chapter on descriptive geometry methods. This simplified method eliminates the rotation axis, being a particular case of level or front rotation methods. The omission of the rotation axis involves performing compound rotational and translational movements, successive movements, until the studied element occupies a convenient position in space, relative to the projection planes, which allows the graphical representation of real dimensions (lengths, angles, areas). This paper presents some examples of problems solved by means of the simplified rotation method, which leads to more intuitive and simple graphic solutions as compared to the classic rotation method.</p> 2019-05-10T18:00:08+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics MODELLING WITH GENERALIZED CYLINDER SURFACES 2019-05-22T17:54:30+00:00 Radu TRIMBITAS Delia DRAGAN Raluca NERISANU Marius BIROU <p>This paper presents several of the most interesting surfaces generated by the spine curve of a generalized cylinder surface, with known parameters exhibiting advantages related to the calculation and drawing of the surface.</p> 2019-05-10T18:13:31+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE IDENTITY OF SPORT EVENTS USING LOGO DESIGN 2019-05-22T17:54:29+00:00 Victor ADÎR Nicoleta Elisabeta PASCU George ADÎR <p>All over the world there are sport competitions, national, international or global (The Olympic Games, The World Football Championship, Women`s World Handball Championship etc.). We really know how important is the graphic representation of each sport event. That means a LOGO. This paper talks about LOGO, the main character in our research for these special events. A logo is a graphic tool allowing an easier identification of something. We have identified very interesting symbols, colours, shapes and other graphic representations which have personalized the event. As a special working direction, it was to study the logos of Olympic Summer and Winter Games along the time. The result astonished us, because we have seen various graphic representations having a lot in common. We have paid attention, also, to other sport competitions all over the world, identifying the graphics and the typology of logos used in this field. We have made „a dissection” of these representations and the conclusions were so interesting. We are convinced that our work is the beginning of a way into a special graphic universe and we have made just the first steps.</p> 2019-05-12T06:48:40+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE NFLUENCE OF THE GEOMETRIC SHAPE ABOVE THE VULNERABILITY OF BUILDINGS - KULA TYPE FROM OLTENIA AND MUNTENIA REGIONS 2019-05-22T17:54:28+00:00 Anca Mihaela BARBU Madalina Xenia CALBUREANU Diana Mara CALBUREANU Gelica STANESCU Ramona Maria PINTOI <p>The main goal of this paper is to highlight the vulnerability during the life time of kula buildings from Oltenia and Muntenia Regions from Romania. This research highlights the characteristic features of massive kula type buildings by masonry built before 1900. A general presentation of these buildings is being performed, from the point of view of unique and particular features, in two distinct cases. The analysis carried out highlights common and different features for each construction. The behavior and the previsions about the lifetime duration of the massive masonry are influenced by parameters such as the constructive system, the geometric shape, the buildings materials properties. These are the parameters analyzed in this paper in order to be used as input in modeling the structures subjected to occasional loads (strong winds, massive snow accumulations, earthquakes, extreme temperatures, humidity, erosion and biological degradation). In such situations the destruction of the masonry elements and the collapse occur due to the accumulated fatigue in the component elements. All the conclusions can be used for performing a fatigue analysis of these buildings for determining the expected life duration.</p> 2019-05-12T07:10:20+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics RESEARCHING AND TRENDS IN OPTIMIZING HIP JOINT PROSTHESIS 2019-05-22T17:54:28+00:00 Patricia Isabela BRAILEANU Ionel SIMION Benyebka BOU-SAID <p>Nowadays the biomechanical field is getting a significant amplitude and the research directions from all over the world are increasingly focusing on the prostheses personalization. In T.H.R. (Total Hip Replacement) the most important factors that lead to a good osseointegration are the design and implicitly hip prosthesis geometry, the prosthetic components orientation, the couple type and the biomaterials used; bone quality and the patients’ medical history, as well as the surgeons’ approaching method in orthopedics may influence the outcome of the hip replacement surgery also.<br>From the first hip implants initiated by Temistocles Gluck between 1853 and 1942 and up to nowadays implants that attempts to reproduce femoral geometry and bone structure, this article aims to present the most important evolutionary stages of hip prostheses and the optimization directions that researchers approach ultimately.</p> 2019-05-12T07:31:38+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics EVALUATING THE CONCEPT VARIANTS OF AN ULTRA LIGHT ELECTRIC SCOOTER 2019-05-22T17:54:27+00:00 Daniel DOBRE Mihail Valentin HORNEA Elena IONITA <p>The paper develops the conceptual design of a lightweight electric scooter with high pliability and portability characteristics. Primarily, the paper focuses on the development and virtual representation of the scooter concept through iterative improvements and the elimination of the weaknesses of design of the previous solution. After three successive iterations a final version is obtained that fully meets the requirements list. Secondly, during concept development, an evaluation of these concept variants is proposed, based on technical and economic criteria. Finally, a positioning matrix of the proposed product is obtained in relation to existing products on the market. A discussion of solutions based on the requirements list is offered also. Several conclusions distinguish the main points and results of the paper.</p> 2019-05-12T07:46:13+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics USING BENCHMARKING TO REDUCE THE FABRICATION COST – A TECHNOLOGICAL ANALYSIS FOR A PART 2019-05-22T17:54:26+00:00 Catalina ENACHE Florina CHISCHOP Narcisa VALTER Mioara DUCA <p>Benchmarking is an approach that involves confronting your organization's own practices with those of other organizations. The benchmarking term involves the measurement that can be obtained by comparing internal and external practices and the result of significant differences can be analyzed and taken into account. This type of approach can lead to higher chances of success because it requires a good understanding of the quality of the products in the competing groups and are being analyzed the competitor’s strategies for development, production, supply and financial. In this article we will analyze the technological flow of obtaining a part, which we will call "plastic niche reinforcement", for which the realization costs will be identified. The objective is to see if the cost of achieving this part falls within the proposed target and if not what decisions can be taken from a constructive point of view to reduce costs.</p> 2019-05-12T08:03:52+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics VISUAL COMMUNICATION BETWEEN CULTURAL MEANING AND FUNCTIONAL EFFECTIVENESS. A CASE STUDY IN UPCYCLING DESIGN 2019-05-22T17:54:25+00:00 Alexandra Stefana GHIOC Radu Bogdan CARNARIU <p>This paper explains the contemporary Design dynamics and shows how specific design processes influence and modify user behaviour and production narrative in the material culture of a transforming society. The research shows the methods used in applying the design process to create an innovative low cost upcycled multifunctional and transformative backpack/bag in the specific context of nomad working. The purpose was not to create a fashion accessory, but to design a new outer case for laptops and various objects. The case study demonstrates the importance of the collaboration between designers, engineers, technicians and entrepreneurs, namely Bisector Studio as a design team and Upside Down as the producer from Iasi in order to achieve functional innovation and relevant visual communication.</p> 2019-05-12T08:17:38+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics USING PERTURBED AIRFLOW SURFACES TO REDUCE DRAG 2019-05-22T17:54:25+00:00 Mihail Valentin HORNEA Ionel SIMION <p>golf ball is a very interesting aerodynamic device. As a sphere, the coefficient of drag should be about 0.48. However, because of the surface of the golf ball, the drag coefficient can be much lower, up to 12%. This paper explores the multitude of ways, designs and concepts that create such a lower drag coefficient, through computational fluid dynamics analysis, and using those findings how to use them when designing new parts to increase the efficiency and reliability of the device that uses said parts while increasing the quality of life of the user of the devices.</p> 2019-05-12T08:33:09+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics CREATING 3D MODEL OF ARCHITECTURAL OBJECTS IN DIFFERENT SOFTWARE 2019-05-22T17:54:24+00:00 Nastasija KOCIC <p>Producing professional-quality 3D models is one of the main requirements in the work of architect. Behind photorealistic renderings lies the precise modeling of the building. The development of technology has led to the fact that today is very easy to get from 2D sketches to 3D models. That’s why it’s important to minimize the time required to finish this part of work and choose the right software for it. In architectural education in Serbia, the most used programs are AutoCAD and 3ds Max. Software as AutoCAD provide simple drawing of 2D plans of any object, while the realistic rendering can be easily obtained in 3ds Max. The question is which program to choose for the middle phase-creating a 3D model. In this paper we will compare the time needed for the same tasks as well as advantages and disadvantages of both programs. Based on the results, conclusions provide recommendations for the most effective solution: 2D drawing and modeling in AutoCAD, and rendering in 3ds Max.</p> 2019-05-12T08:43:48+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics A COMPARATIVE STUDY ABOUT CARS’ LOGOS 2019-05-22T17:54:23+00:00 Nicoleta Elisabeta PASCU Victor ADIR George ADIR <p>In this paper, we have considered as a challenge to answer to the question: Why is so important a logo for a car? Because, as we know, we can identify a car or, in many cases, a car manufacturer, only by seeing its logo. In this research study we have „questioned” a lot of logos for different cars, identifying the geometric shapes, colours and symbols used to create distinct and expressive logos. During our research, we have understood that a logo for any car is not the result of an easy work, but the designer has to prove creativity, imagination and graphic skills, by taking into consideration the two stages of the design, namely: The Preliminary Research and the Creative Working. This „investigation trip” inside the universe of logos was a privilege for us, highlighting, once again, the great importance of the graphic representation for any product / service etc. Our research has been developed over three months, allowing us to accumulate a huge quantity of information as regards such special logos. We have identified different colours and symbols used in logos, interesting geometric associations and, also, many examples for redesigning in time cars’ logos. For a car, a logo is an adequate and eloquent element of identification. Our paper could be considered as a pleading for creativity, original and initiative in this field.</p> 2019-05-12T08:57:13+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics GEOMETRICAL STRUCTURES AND SYMMETRY LANGUAGE IN GEORGE DAVID BIRKHOFF’S STUDIES 2019-05-22T17:54:23+00:00 Ana Maria Mihaela RUGESCU <p>Our study is a theoretical approach to David Birkhoff’s theory on aesthetical measure and other theories of measure, as a potential path to improve aesthetic engineering theory. Golden ratio, fractal dimension, a few principles of design, self-organizing maps, evolutionary systems and the concept of complexity measures are the steps we considered. Our conclusion is that an objective measure of the aesthetic concept is far from being put to life.</p> 2019-05-12T09:05:36+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE GRAPHIC MODEL AND THE CONSTRUCTIVE-FUNCTIONAL ANALYSIS OF A NORMALLY OPEN DIRECT-ACTING VALVE 2019-05-22T17:54:22+00:00 Nicusor BAROIU Georgiana Alexandra COSTIN <p>The valves are elements which provide the opening of a hydraulic circuit when the flow in one direction exceeds a certain value. This paper presents the basic concepts about valves, in general, and also the 3D graphic model of a normally open direct-acting valve in the Autodesk Inventor design environment, respectively, an analysis of such a valve, both functionally and constructively, as well as from the point of view of a calculation of forces acting on some elements of the valve. At the same time, carry out the CAM simulation in the manufacturing process of the mark "Screw".</p> 2019-05-19T05:15:47+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE INTERACTIVE GEOMETRIC SOFTWARE - A MODERN TOOL IN FORMING AND DEVELOPMENT OF THE ENGINEERING THINKING 2019-05-22T17:54:21+00:00 Petru DUMITRACHE <p>The purpose of the paper is to highlight the great applications of the interactive geometric software in exploring and thoroughgoing study of some chapters of applied mechanics.<br>In first part of the paper is presented advantages of using interactive geometric software in training and development of the engineering thinking, as well as the main chapters of applied mechanics in which the use of these software environments is recommended. Following are detailed case studies that illustrate the using an interactive geometric software in applied mechanics. At the end of the paper, the author's observations and conclusions are given.</p> 2019-05-19T05:38:00+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics USING TOPOGRAPHIC ELEVATIONS IN CREATING TRAFFIC SCENARIOS IN JUNCTIONS 2019-05-22T17:54:20+00:00 Bogdan Stefan FLORESCU Laurentiu RACILA Alexandru OPRICA Lucian MATEI Ilie DUMITRU <p>Due to the changes in the road traffic caused by the continuous growth of the motor fleet, the increase of the existing fleet mobility index and the increase in the number of vehicles passing through the city, it is usually necessary to intervene in the road traffic with traffic lights. It is necessary to transform the old system of the traffic network into a new efficient system, corresponding to a new road infrastructure with increased vitality. The paper aims to demonstrate the use the elevation from topographic equipment’s to design the junctions vertical and horizontal signalization, in every detail.</p> 2019-05-19T05:55:30+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics MODAL DYNAMIC ANALYSIS FOR THE SHAFTS OF A GEARBOX 2019-05-22T17:54:20+00:00 Ionut GEONEA Alexandru MARGINE Cristian COPILUSI Dragos TUTUNEA Valeriu IONICA <p>The main goal of this paper is to determinate the deformations of the shafts of a gearbox. A CAD model of a gearbox is designed in SolidWorks. The dynamic simulation of the gearbox is performed with ADAMS multibody software. In the first step of the simulation the parts are considered as rigid ones. The second step of the simulation proposes to consider the elasticity of the parts, especially of the gearbox shafts. For that, the shafts are meshed with tetrahedral finite elements in order to be considered as deformable solids. The results of the simulation are the shafts vibration modes and the deformations of the mass centers that are discussed in the paper.</p> 2019-05-19T06:10:21+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics MODERN ANNOTATE AND EXPORT INSTRUMENTS IN 3D PDF FILES 2019-05-22T17:54:19+00:00 Adrian Mihai GOANTA <p>The paper presents two novelties with respect to INVENTOR 2018, namely: direct 3D model sizing, adding prescriptions on roughness, shape and position deviations, including the ability to export the 3D model to PDF files to allow 3D rotation commands , obtaining sections, shade views, wireframe, etc. The modernity of these tools leads to the obtaining of PDF files independent of the IPT native file, which further allow for an efficient communication between the designer and the respective operator.</p> 2019-05-19T06:17:57+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THERMAL COMFORT IN OFFICE BUILDINGS 2019-05-22T17:54:18+00:00 Ancuta Nadia JURCO Liviu Iacob SCURTU <p>In this paper is studied the thermal comfort in an office room. The first part of the paper presents the state of the art of numerical methods and graphical determination of the thermal comfort in buildings. Using the advanced modelling techniques, in the second part of the paper, the office volume with the ventilation and evacuation systems are modelled. The simulation is achieved using the CFD module from the SolidWorks software, where is assigned the mechanical properties to all components. In this paper are studied three simulation cases. The obtained results from the first case are compared with the results from the second and third case. In the last part of the paper are presented the conclusions of this study.</p> 2019-05-19T07:56:38+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics METAMATERIAL USAGE IN DESIGN OF BILATERAL PROTHETIC LEGS 2019-05-22T17:54:18+00:00 Boris KOSIC Misa STOICEVIC Zorana JELI Branislav POKONSTANTINOVIC Aleksandra DRAGICEVIC <p>The paper idea was to investigate is it possible to design running prosthesis with similar design as running blades using only 3D printing technique and ABS, as one of the most used plastic material in the world. This material is very strong and manufactured parts are not very flexible. By using metamaterials some models of human running prosthesis were created and a number of simulations were made through SolidWorks Design Study package. Used approach allows finding of the best solution for custom-made human running prosthesis with the best characteristics.<br>Present paper gives the evidence that using of smart geometrical design of inner structure of various parts and models to reduce its mass and improve their mechanical characteristics is possible. Also, obtained model is suitable for 3D printing and it can be opportunity to product cheap prosthesis for a large number of people with disability.</p> 2019-05-19T08:16:03+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics 3D MODELING METHOD USED FOR THE DESIGN OF A VEHICLE KNUCKLE 2019-05-22T17:54:17+00:00 Gabriel Catalin MARINESCU Ludmila SASS Anca DIDU <p>The paper presents the 3D virtual modelling process of a vehicle suspension part using CAD software. The knuckle is the subject of this design due to its geometric complexity. It is part of the rear double wishbone suspension of a rear wheel drive vehicle. There are presented the main steps for the design of the knuckle including the specific features for each operation. The further purpose of this design is the reverse engineering and manufacturing by using 3D printing technology.</p> 2019-05-19T08:30:10+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics SOFTWARE FOR GRAPHIC POSTPROCESSING IN SEISM NUMERICAL SIMULATION OF THE BUILDINGS EQUIPPED WITH ANTISEISMIC DEVICES 2019-05-22T17:54:17+00:00 Mihai NEGRU Adriana IONESCU <p>This paper presents a graphic software made by the authors in Delphi programming in order to optimize the antiseismic device system of a building. The input data consists in the relative displacements for each story during the seism simulated with a certain accelerogram. The program can graphically process up to three data blocks obtained with GenEcAm software for the same building equipped with three different antiseismic systems. The advantage of this software is the graphical comparison of the story relative displacements during seism using different antiseismic system, in order to choose the best dissipative system for the building.</p> 2019-05-19T08:40:01+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics VIRTUAL TEST APPLIED ON A 3D MODEL OF VERTEBRAL COLUMN 2019-05-22T17:54:16+00:00 Vladimir ONTICA Andrei TUDORA Danut Nicolae TARNITA Dragos Laurentiu POPA George GHERGHINA Bogdan CAPITANESCU <p>In this paper we have detailed the CAD methods that led to the obtaining of vertebrae and intervertebral discs. Initially, all the vertebrae from a corpse were scanned three-dimensionally. These models have been taken over in the Geomagic program where replenishment, triangle reduction and finishing techniques have been applied. These surface models were imported into SolidWorks where they were transformed into virtual solids. In the Assembly module, all the virtual vertebrae were loaded where they were positioned anatomically. A system of vertebrae L4, L5 and intervertebral disc was analyzed in Ansys Workbench. Finally, important conclusions were drawn.</p> 2019-05-19T08:58:38+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics CONFIGURING THE STREET TRAM THROUGH THE AIMSUN SOFTWARE GRAPHICAL ELEMENTS 2019-05-22T17:54:15+00:00 Alexandru OPRICA Alexandru DIMA Dragos TUTUNEA Lucian MATEI Ilie DUMITRU <p>The transportation system is a complex, alive and dynamic mechanism. Taking into account all of the problems of a public transport the difficulty is to make a virtual network that can be improved and organized from the point of view of a systemic approach. Now, public transport is a critical point in urban development and should be treated as one of most important areas in a city. Public transport in the city is considered to be of great importance, in terms of social development and quality of life. In terms of city development, an important aspect is to create a public passenger transportation system that is safe, affordable, economical, reliable and environmentally friendly. The role of the public transport in economy and all aspects of the city development, from the point of view of the citizens, dictates the need to introduce measures in the system that are harmonious, balanced and effective and that can make the difference from development to stagnation.</p> 2019-05-19T09:18:46+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE POSSIBILITIES OF USING AN OUTLINE CRASH SKETCH IN MODELING AND SIMULATION OF ACCIDENTS 2019-05-22T17:54:14+00:00 Oana OTAT Lucian MATEI Victor OTAT Ilie DUMITRU Magdalena DRAGOVIC <p>The paper underpins the reconstruction and analysis of a vehicle - motorcycle-biker-assembly collision type by means of a graphical method. The virtual modeling of the traffic accident reconstruction was achieved by complying the traces and the distances identified; hence it was imported and developed the accident scene sketch. Following the numerical processing of the simulation, the vehicles speed during the pre-collision, collision and post-collision phases was determined in graphical form, generating speed and space variation diagrams.</p> 2019-05-19T09:31:26+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics PARAMETRIC 3D MODELING OF I-SHAPE KITCHEN 2019-05-22T17:54:14+00:00 Petar PEJIC Dimitrije JOVANOVIC Jovan MARINKOVIC Vesna STOJAKOVIC Sonja KRASIC <p>Interior design is the science and art of enhancing the interior of a space in order to achieve a more aesthetically pleasing and functional environment. Furniture as an important element of space decoration can be ready-made or custom-made (goal - maximal use of space). Kitchen design requires many elements disposition rules to be respected in order to get functional space. Therefor interior designer has to spend time on solving this functionality problems and have less time for creative aesthetic work. We developed an algorithm for automatic I-shape kitchen organization on the basis of available kitchen dimensions. This algorithm automatically generates kitchen disposition and makes a parametric 3D model. Developed algorithm is implemented and tested using SketchUp dynamic components.</p> 2019-05-19T09:46:36+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics ABOUT THREE-DIMENSIONAL MODELS OF OSTEOSYNTHESIS SYSTEMS 2019-05-22T17:54:13+00:00 Ilaria Lorena PETROVICI Mihai Catalin TENOVICI Razvan Cristian VADUVA Danut Nicolae TARNITA Georgiana VINTILA Dragos Laurentiu POPA <p>Implantology is based on the failure of orthopedic treatment, or cases where orthopedic treatment is incapable of reducing or maintaining, for example, fracture of the femoral neck with<br>movement. The advantage of centromedular fixation is that it allows the bone to physically load as much as possible, minimizing the risk of implant failure. The drawbacks of conventional nails have been eliminated with the introduction of the centromedular stem locking system. The purpose of this study was to obtain several virtual biomechanical systems on which to study several types of tibial fractures and several osteosynthesis systems. Starting from the tomographic images of the tibia, a virtual model of this bone component was developed. This model was "finalized" and modified using certain Geomagic techniques and then imported into SolidWorks. The osteosynthesis element used was the rigid classical nail with orthopedic screws which was modeled using the direct observation and measurement method. It is intended that these virtual components to be used to make orthopedic virtual osteosynthesis systems that are then analyzed in Ansys with the finite element method.</p> 2019-05-19T10:09:00+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics NEW WAYS TO CONFIGURE THE PARAMETRIZED MODEL DOCUMENTATION 2019-05-22T17:54:12+00:00 Valentina POMAZAN <p>Manufacturers are moving toward 3D printing and CNC machining and 2D documentation, with traditional dimensioning and tollerancing becoming less relevant. MBD allows the addition of the dimensions and surface finishes that would have been traditionally communicated via 2D drawings. Existing electronic formats and viewers provided by most of the large commercial CAD-CAM products and electronic signatures legislation exclude, in most cases, the necessity of hard copy printing and the project data base is easely handled using the BOM structures. This papers will present the configuration of the model based definition and solution for linking the design knowledge content, using Autodesk Inventor®.</p> 2019-05-19T10:15:39+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics FLUID FLOW ASPECTS REGARDING TURBULENT REGIME AS A CHARACTERISTIC OF FLUIDIC SYSTEMS 2019-05-22T17:54:12+00:00 Fanel SCHEAUA <p>There are obvious many applications in the industry field that use fluidic systems in order to drive different specific equipments and machines. That is why the research activities aimed for analyzing and studying the involved phenomenon at the level of these force applications are justified. In order to do this is needed to start with the flow pattern used inside the working circuits of these applications. This paper presents some aspects of the turbulent flow model that predominates within fluidic actuation systems, with focus mainly on the values of specific parameters involved in the flow process with a certain velocity value working at high pressure values.</p> 2019-05-19T12:02:42+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics AIRFLOW AND THERMAL COMFORT OF THE BUS PASSENGERS 2019-05-22T17:54:11+00:00 Liviu Iacob SCURTU Ancuta Nadia JURCO <p>Nowadays, the thermal comfort in the means of transport is an important field of research, which have a positive impact on the health of the passengers and the driver. The latest research, results and methods, to determining the comfort in means of transport are presented in the first part of the paper. The thermal comfort study is carried out on an existing bus geometry. The bus geometry is modelled in SolidWorks using blueprints available on the web. The simulation is done for three cases: the first case where the ventilation system is open at maximum capacity, the second case where the ventilation system works at maximum capacity whit the air deflectors mounted for a better distribution of the air and the last case when the bus velocity is 14m/s whit two rear windows opened. The results of the first simulations are analysed and a location of deflectors is proposed for an optimal distribution of air inside the bus. In the last part of the paper we compare the obtained results, highlighting the conclusions of this study.a</p> 2019-05-19T12:12:09+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics COMPUTER PROGRAM WHICH PROVIDES AUTOMATIC DETERMINATION OF SOME CHARACTERISTIC NECESSARY FOR CORRECT DIMENSIONING AND PRINTING OF THE TECHNICAL DRAWING FOR CONSTRUCTION 2019-05-22T17:54:10+00:00 Andrei SLONOVSCHI Liviu PRUNA <p>In the steps preceding the dimensioning and printing of a technical drawing for construction, a series of settings must be made which, if not done correctly, make that the printed drawing and the elements represented in that drawing not comply with the rules of the technical drawing for constructions and the representations made are not correctly understood. Bearing in mind these elements, the authors have developed an original computing program that works on the AutoCAD software interface, which helps users make the necessary settings so that the sheets will finally respect the technical drawing rules regarding the correct use of the print format, of choosing of the title block, of the scale of representation, and the optimal view of delimiters and quota values.</p> 2019-05-19T12:20:23+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE MODEL OF A PROSTHETIC SYSTEM FOR HUMAN KNEE JOINT 2019-05-22T17:54:10+00:00 Mihai Catalin TENOVICI Ilaria Lorena PETROVICI Razvan Cristian VADUVA Danut Nicolae TARNITA Dragos Laurentiu POPA Alin ONCESCU <p>Obesity, sedentarism, and other disadvantages of the modern age have led to the emergence of unknown pathological situations a few centuries before. At the same time, the development of medicine, orthopaedic surgery has led to finding ways to solve these situations. The present paper proves that the use of high-tech methods used in engineering can generate solutions in the field of orthopaedics both for obtaining new prothesis models, but also by creating virtual environments for tests. Several CAD techniques and techniques have been explored, coupled with medical imaging, can provide exciting solutions for obtaining virtual environments that can allow "in vitro" analysis of various normal, pathological or prosthetic joints. In this paper we have detailed how to obtain a prosthetic knee joint in a parameterized environment. This joint was tested virtually. In the final of the paper, main conclusions were made.</p> 2019-05-19T12:38:10+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics COMPARED ANALYSIS OF STANDARD AND PARAMETRIC MODELING ON THE STUDY CASE OF CATHEDRAL BRASILIA OF OSCAR NIEMEYER 2019-05-22T17:54:09+00:00 Zlata TOSIC Sonja KRASIC <p>Conventional CAD software support, such as Auto Cad, is considered limited or rather complicated when it comes to freeform geometry design, because of their tools for modelling. Even though it cannot be said that in every case of complex forms they are unusable, they are limiting modelling conditions and quality of results in general. These statements are demonstrated with case study of modelling Cathedral Brasilia of architect Oscar Niemeyer in program Auto Cad and Rhinoceros. Comparative analysis will show that for every tested norm the software Rhinoceros was more efficient. Goal is also to encourage engineers to use contemporary programs while experimenting and designing complex forms because of the variety of different tools and methods that can be exploited and effective.</p> 2019-05-19T12:46:17+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics SPACE SYNTAX METHOD IN CASE OF THE URBAN FRACTURES BETWEEN THE HISTORICAL ARCHITECTURE AND THE SOCIALIST ARCHITECTURE IN THE ROMANIAN CITIES 2019-05-22T17:54:08+00:00 Andreea TRIF <p>The urban fractures between the historical architecture and the socialist architecture in the Romanian cities is a wide and significant phenomenon especially because the actual planning strategies do not address this problem. There are strategies for the protection of the historical buildings, there are strategies for the development of the socialist buildings, but not for the urban fractures as a whole. The paper presents an advanced digital methodology for the multi-criterial analysis of the urban fractures in order to discover ways of defining and regenerating them. In fact, the brutal interventions which led to the urban fragmentation of the Romanian cities could be researched and solved through computer based methodology.</p> 2019-05-19T12:56:40+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics VIRTUAL HUMAN HIP JOINT OBTAINED FROM CT IMAGES AND FEM TEST 2019-05-22T17:54:08+00:00 Andrei TUDORA Vladimir ONTICA Danut Nicolae TARNITA Dragos Laurentiu POPA Daniel Cosmin CALIN Alin ONCESCU Bogdan CAPITANESCU Dana ALBULESCU <p>Hip joint is one of the most complicated in the human body. It is complex due to the complicated geometry, but also to the biomechanics of this joint. Initially, three-dimensional scanning of a femur was attempted, but due to the fact that only the outer geometry could be obtained, this method was dropped. Computational methods have been used that based on identifying shades of gray on tomographic images and transposing them into geometries (surfaces). These surfaces processed with the Geomagic program were transformed into virtual solids in SolidWorks. In this program, bone components were assembled and pubic symphysis was modeled. Finally, the model was exported to Ansys where, based on normal walking loads, a finite element method simulation was performed. At the end of the paper interesting conclusions were highlighted.</p> 2019-05-19T13:12:50+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics STRESS AND DISPLACEMENT ANALYSIS FOR A PIPES SUPPORT 2019-05-22T17:54:07+00:00 Mihaela URDEA <p>In this paper, a structural analysis with Weldment Structural Members is performed. Halfen Company provides solutions for pipes support. The assembled support structures are characterized by increased stiffness, their elastic deformations being reduced. The identification of stress and deformation fields is done by finite element analysis. The purpose is to create a finite element model, to find the best shape of a pipes support using SolidWorks. It is very important to avoid oversizing the support.</p> 2019-05-19T13:18:52+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THREE-DIMENSIONAL MODEL OF A HIP PROSTHESIS 2019-05-22T17:54:22+00:00 Razvan Cristian VADUVA Ilaria Lorena PETROVICI Mihai Catalin TENOVICI Danut Nicolae TARNITA Dragos Laurentiu POPA Daniel Cosmin CALIN Otilia ROGOVEANU <p>Serious pathological problems of the hip joint can be solved surgically, in some cases by joint prosthesis. For this reason, it is very important to be able to shape, in a first phase, the components of the prosthesis, which can then be tested virtually. For this purpose, the components of the prosthesis with fixation pins were firstly scanned three-dimensionally. This operation resulted in a model of a "cloud of points" which was subsequently transformed into virtual surfaces, then into virtual solids. These virtually solid components were assembled in a parameterized virtual environment. This prosthesis can be inserted into a biomechanical model of the hip joint and tested using the finite element method. At the end of the paper important conclusions were drawn.</p> 2019-05-19T00:00:00+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THREE-DIMENSIONAL MODELING OF THE DENTAL-MAXILLARY SYSTEM 2019-05-22T17:54:06+00:00 Mihaela VATU Daniela VINTILA Rodica MERCUT Sanda Mihaela POPESCU Dragos Laurentiu POPA Ilaria Lorena PETROVICI Georgiana VINTILA Allma PITRU <p>In this paper, a virtual model of the dental-maxillary device was obtained by scanning a skull taken from a corpse, and using a few sets of tomographic images. These images were processed with a program that allows the transformation of tomographic images into three-dimensional geometries based on gray shades. In an initial phase these geometries were in the form of discontinuous surfaces, which were then processed, finalized and transformed into virtual solids. Thus, in the SolidWorks program the dental-maxillary device was obtained as virtual solids. Such a Multi Body model has undergone kinematic simulations in the Motion model of SolidWorks, where the entire load system to which the analyzed model is subjected. At the end of the paper, important conclusions were highlighted.</p> 2019-05-19T13:55:55+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics FROM EAST TOWARD WEST 2019-05-22T17:54:06+00:00 Naomi ANDO <p>In this paper, I would like to overview what I learned from Europe. I havebeen fascinated by European architecture and cities. I have always thought that architecture and cities were interesting because they all have their own places and histories. Here, while adding later analyses and related matters, my first study on European Plazas and the other studies are focused on.</p> 2019-05-22T05:58:59+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics AN EDUCATIONAL APPLICATION OF GRAPHIC FACILITATION 2019-05-22T17:54:05+00:00 Alina Angelica ANGHEL Vanda Ligia DANAILA <p>Graphic facilitation visually sends ideas, through simple and fast techniques, neglecting the artistic component of the drawing and emphasizing the essential. The contribution of this paper is a project of graphic facilitation during technical drawing classes of students in engineer sciences and industrial management and for informal learning. This educational application comprises more themes and a final evaluation</p> 2019-05-22T06:23:32+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics CONSTRUCTING THE SKETCH AND THE DRAWING AT A PROPER SCALE OF AN OBJECT 2019-05-22T17:54:05+00:00 Mihaela Rodica CLINCIU <p>This paper presents a teaching activity having the topic „Constructing the sketch and the drawing at a proper scale of an object” and is addressed to the teachers who teach technical drawing in technical university education, but also to the students. The paper represents a help both for the professor in achieving learning objectives, but also for the students who need to understand easily the information and knowledge required by other fields.</p> 2019-05-22T06:32:29+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics ASSESSMENT AND IMPROVEMENT OF SPATIAL ABILITY DEVELOPED BY GRAPHICAL SUBJECTS 2019-05-22T17:54:04+00:00 Georgiana CORSIUC Carmen MARZA Ana-Maria GRAUR <p>The ability to mentally manipulate 2D and 3D figures is defined as spatial visualization ability and can be measured with simple cognitive tests such as Mental Rotation Test and Mental Cutting Test. Improving student’s spatial abilities is considered an important component in technical education and graphical subjects, in particular, Descriptive Geometry, have an important role in shaping spatial visualization abilities of future engineers and architects. In this paper are presented the results of MRT and MCT of the students from the Faculty of Architecture. They were tested in the first week of school, in the first year and then at the end of the first semester, following the course of Descriptive Geometry. Test results were analyzed and interpreted from different points of view.</p> 2019-05-22T06:48:15+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics TEACHING DESCRIPTIVE GEOMETRY – CONSTRUCTING AND DEVELOPING THE SURFACES OF SOLIDS 2019-05-22T17:54:03+00:00 Ramona CLINCIU <p>The paper presents applications developed for teaching descriptive geometry – representation of solids and development of the surface of the solids. The purpose of the applications presented is to enable the development and improvement of the spatial ability of the students such as to understand the methods used in descriptive geometry for constructing and developing the surfaces of the solids.</p> 2019-05-22T06:55:36+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE USE OF SOFTWARE IN DESCRIPTIVE GEOMETRY AND TECHNICAL DRAWING COURSES 2019-05-22T17:54:03+00:00 Sergiu DINTU Angela SULETEA <p>The development of information technologies requires the use of software to solve engineering tasks. The study program should provide for the study of this software. According to the current program, it is studied as a separate discipline. We believe that it should be studied in core disciplines as a tool for solving engineering tasks. Our goal is to use a teaching methodology for graphic issues by including this software in Descriptive Geometry and Technical Drawing courses. The article presents a method of intercalating these topics that are studied in the first year of study with SolidWorks, AutoCAD and Inventor software.</p> 2019-05-22T08:14:29+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics COMPUTER GRAPHICS USED TO OVER CONSTRAINED MECHANISMS’ MOBILITY 2019-05-22T17:54:02+00:00 Ionut GEONEA Simona-Mariana CRETU <p>The objective of this study is the use of computer graphics as teaching methodology in the field of robotics, focused on over constrained mechanisms’ mobility. Because the analytical methods applied to calculate the mobility of robots have a high mathematical level, but also because certain parameters of over constrained mechanisms are usually determined by structural methods, we have used computer graphics in ADAMS in the teaching process, so that students easily understand the connection between theory and practice, and then solve the engineering applications.</p> 2019-05-22T08:23:28+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics STUDENTS' APPROACHES ON WARPED SURFACE 2019-05-22T17:54:01+00:00 Ana-Maria GRAUR Carmen MARZA Georgiana CORSIUC <p>The geometric challenges in the architectural design of warped surface come mainly from the physical materialization. This paper presents structural forms based on warped surface and shows the types of structures made during the 20th and 21st century, the geometric scheme, the structural behaviour and a projection of their potential trends. The analysis creates the possibility of comparisons between original and current design. Also, this work analyses the ways in which descriptive geometry, by warped surface allows the students architects the realization of volumes and architectural spaces, especially the role it plays in the development of spatial thinking.</p> 2019-05-22T08:34:08+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics INTRODUCTION OF RHINOCEROS SOFTWARE FOR EXERCISES OF SUBJECT GEOMETRIC SURFACES IN ARCHITECTURE 2019-05-22T17:54:01+00:00 Sonja KRASIC Zlata TOSIC Petar PEJIC <p>In contemporary architecture, free curved forms of objects, or parametrically modeled shapes, are in the expansion. The authors had an interest to upgrade student’s knowledge with complex geometry design and contemporary software such as Rhinoceros. In that manner we made an exercise templates, that our students on Architecture used in elected subject „Geometric Surfaces in Architecture“ where they learned about types, usage and design of geometric surfaces in architecture. By creating templates we reassure precise, faster and planed work with students as they obtain every possible explanation, for every exercise and homework that they have to master. Moreover this teaching method allows students not only to pass the course and learn new modeling and design techniques, but also keeping the prepared material as support for future architectural work.</p> 2019-05-22T08:43:21+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics INNOVATIVE TEACHING AND LEARNING AT ENGINEERING IN SALERNO (ITALY): THE MASTER DEGREE MODULE IN VIRTUAL DESIGN LAB 2019-05-22T17:54:00+00:00 Alessandro NADDEO <p>How can academics and teachers improve the learning capabilities of Master Degree (MD) students of Engineering courses through the use of new methodologies, new instruments and new teaching approaches? This paper wants to give a possible answer to this question by sharing the experience of Virtual Design Lab module at the faculty of Engineering at University of Salerno (Italy). Teaching and learning methodologies are explained and the experience of students is evaluated through a standard questionnaire. Results seem to be promising for the organization of new modules.</p> 2019-05-22T08:51:00+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics A CREATIVE IDEA OF AN UNDERGROUND TOWER CEMETERY 2019-05-22T17:53:59+00:00 Oana NECULAI Ana – Maria TOMA <p>One of the biggest problems of nowadays society regarding burial sites is the lack of space and, at the same time, the huge areas that cemeteries occupy. This problem was approached during the course of “An introduction to technical creativity” and a possible solution was reached with the help of students, using brainstorming and the 3d criteria method. The proposed concept consists in building an underground cemetery, as a buried tower of minimum 20 floors down, which can accommodate hundreds of coffins. The building will appear, at the ground-floor level, like a funeral monument, but in depth, the access to the burial chambers will be made with an elevator placed at the middle of the structure. Therefore, in a world where cemeteries occupy huge areas, this concept provides an alternative to traditional customs and approaches a topic that concerns all humanity.</p> 2019-05-22T09:55:43+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics COMPUTER GRAPHICS - ENGINEERING ANIMATION STUDY PROGRAM AT THE FACULTY OF TECHNICAL SCIENCES IN NOVI SAD 2019-05-22T17:53:59+00:00 Ratko OBRADOVIC Milos VUJANOVIC Branislav POPKONSTANTINOVIC Dragan IVETIC Predrag SIDANIN <p>Computer Graphics - Engineering Animation study program got certified at the Faculty of Technical Sciences in Novi Sad, University of Novi Sad, Serbia in December 2010. The study program consists of Undergraduate Academic Studies (UAS) that last 4 years (8 semesters), Master Academic Studies (MAS) that last a year and Doctoral Academic Studies (DAS) that last 3 years. The first generation of students enrolled in 2011 and this generation finished their UAS and graduated with an engineering degree in Computer Graphics. Now they are studying at MAS and the first student received a master degree in September 2018. UAS comprise 48 subjects, 37 compulsory subjects and 11 elective positions with a choice of several subjects, while MAS comprise 11 subjects with three elective positions. This article shows the curriculum of UAS, MAS and DAS, with the list of subjects, the number of classes for each subject and European Credit Transfer and Accumulation System (ECTS) for these Curricula. A general division of our study program would be into two parts: one in which students learn all the techniques and software needed for digital production of animated films and visual effects and the other which is primarily focused on the processing or manipulation with pictures. In this paper, we will present our study program Computer Graphics - Engineering Animation which is prepared for the third accreditation cycle in 2019 in the Republic of Serbia.</p> 2019-05-22T10:10:17+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics PRODUCT AESTHETICS FOR MECHANICAL ENGINEERS 2019-05-22T17:53:58+00:00 Misa STOJICEVIC Zorana JELI Boris KOSIC Ivana CVETKOVIC Rodoljub MILICEVIC <p>This paper gives a scope of course called Product aesthetics at Mechanical faculty, University in Belgrade, Serbia. During this course students are learning about standards and laws in process of product design. With this knowledge students are able to create more profound ability of aesthetic evaluation and form aesthetic judgement of in creating certain mechanical product such as car, motorcycle etc. Practical part of this course includes creating a product by using a 3D CAD software which has both aesthetic value and practical usage. Students are presenting that product to other students and they give their evaluation grade.</p> 2019-05-22T10:21:28+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics PROFESSIONAL VALUES IN HIGHER TECHNICAL EDUCATION 2019-05-22T17:53:57+00:00 Ana – Maria TOMA Oana NECULAI <p>Looking at the educational system in Romania, one can easily see that there is a very big difference between what people learn in school and what it is needed in the work field of our society. Considering all this, the present paper proposes an analysis of how professional values are perceived and understood by students who are at the University now, and who will soon face the challenge of finding a job. Finding these values in the beginning of the University studies, the professors can adopt new ways of teaching, in order to help the students, prepare better for their professional life.</p> 2019-05-22T10:28:22+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics STUDIES ON THE REDESIGN OF THE TEACHING PROCESS USING THE METHODS OF QUALITY ENGINEERING 2019-05-22T17:53:57+00:00 Narcisa VALTER Ioana-Catalina ENACHE Mioara DUCA <p>Experience as a university teacher has shown us that with the changing times, the student's attitude towards the teaching process changes. In this paper, the authors make an original study by aiming to lay the groundwork for a method of teaching courses adapted to the new requirements and new student capabilities. The paper proposes a methodology to redesign the learning process, using the tools, techniques and methods specific to Quality Engineering, such as: QFD technique, AFFINITY diagram, ISHIKAWA technique, etc. Our aim is to increase the quality of the teaching process and, above all, to increase the student's interest towards the class.</p> 2019-05-22T10:36:59+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics SYNTHESIS AND ANALYSIS OF A MECHANISM GENERATING THE RATIONAL CIRCULAR CUBIC 2019-05-22T17:53:56+00:00 Mirela CHERCIU Iulian POPESCU <p>Based on the mathematical curve named rational circular cubic [2] and on its animation, it was conceived an original mechanism generating this curve. The mechanism has an additional kinematic chain that provides the drawing point of the curve as the center of a variable length straight segment. There are given the successive positions of the mechanism and the drawn curve, as well as the similar curves obtained at different positions of the fixed vertical straight and the driving's element joint. Such a mechanism can be used in textile machines, as a toy, in kinetic art, etc.</p> 2019-05-22T15:18:32+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics STEREOGRAPHIC PROJECTION OF THE HEAVENS OVER BELGRADE USED FOR THE CONSTRUCTION OF ASTRONOMICAL CITY CLOCK 2019-05-22T17:53:56+00:00 Ivana CVETKOVIC Branislav POPKONSTANTINOVIC Misa STOJICEVIC Ratko OBRADOVIC Rodoljub MILICEVIC <p>There are many different ways of rendering 3D objects into two dimensions. Different kinds of projections are able to represent things like size, areas, distances or perspective, realistically. One particular kind of projection used for representing spheres and circles on spheres in two dimensions (i.e. some maps of the earth or celestial sphere) is stereographic projection. Stereographic projection has two important characteristics that differentiate it from other kinds of projections: it preserves circles and angles. This paper discloses the construction of the stereographic projection of the celestial sphere over Belgrade as the clock face of the astronomical clock. This astronomical clock will be capable to present the motion, as seen from the Earth, of the Sun, Moon, Ecliptic and the phases of the Moon during the year. Moreover, the hours of the sunrise, noon and sunset will be clearly observed on the stereographic dial of the astronomical clock.</p> 2019-05-22T15:32:46+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics COMPUTER-AIDED GRAPHICS IN THE DESIGN OF MOBILE MECHANICAL SYSTEMS 2019-05-22T17:53:55+00:00 Anca DIDU Andra CONSTANTIN Violeta CONTOLORU Cristina ROTEA Gabriel MARINESCU <p>There are presented analytical and virtual prototyping methods for the kinematic study of the mechanism from an industrial robot with 5 degrees of freedom. The authors are interested in the analytical and graphical identification of the work space, including the kinematic parameters, which are necessary in the geometric modeling of the kinematic couplings. The virtual prototyping for a worm gear that forms a rotation coupler from the robot structure has been made. Adams and ALGOR programs were used.</p> 2019-05-22T15:45:54+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics CHALLENGES IN THE 3D MODELING OF A FIELD CULTIVATOR FOR SOIL PREPARATION 2019-05-22T17:53:54+00:00 Andrei KIRALY Monica Balcau <p>Prior to planting, the soil must be prepared usually by machines called cultivators. Older field cultivators are suitable for modification for row cropping. The crops and the tractor power available will determine specific needs. Factors to consider include row spacing and row spacing flexibility, whether you need a towed or tractor mounted unit, frame size and layout, ease of levelling, ease of moving, removing, and replacing shanks, overall machine condition, and the robustness of the shanks. The paper describes the struggle concerning the 3D modelling of such a field cultivator with special features.</p> 2019-05-22T15:52:30+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics OPTIMIZING THE FORMS AND DIMENSIONS OF A FIELD CULTIVATOR WORKING KNIVES 2019-05-22T17:53:54+00:00 Andrei KIRALY <p>The paper presents some considerations regarding the optimisation of working bodies of a field cultivator for soil preparation also known as combiner. Calculations in deformable body mechanics, thermal conduction, dynamic analysis, etc. lead to global systems of equations with many unknowns. The solution of these equation systems is dependent on the electronic computer, which have a great deal of efficiency compared to the matrix formulations of the problems.</p> 2019-05-22T16:04:20+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics STUDY ON MODULAR HOUSES DESIGN 2019-05-22T17:53:53+00:00 Carmen MARZA Georgiana CORSIUC Ana Maria GRAUR <p>In the field of civil engineering, in the last period emerged and developed the idea of modular constructions, which is in consensus with the alert rhythm of the present times that we are going through, while responding to the requirement of economic efficiency. In this paper the authors present a project for some modules that can be assembled in several ways so that according to the destination and the requirements of the clients they can be personalized to meet their needs and expectations. Obviously, special attention has been paid to the technology of joining modules, solving the covering surfaces and other execution details required to ensure comfort in the habitat area.</p> 2019-05-22T16:12:54+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics GEOMETRIC REDESIGN OF THE SUBDIVIDED SURFACE OF CC II: APPLICATION IN ARCHITECTURE 2019-05-22T17:53:52+00:00 Marija OBRADOVIC <p>The concave polyhedral surface of CC II can be used as a structural template for architectural design of domes, roofs or other covering or stand-alone structures. Subdivision of CC II faces in geometrically defined way can be observed as a part of the design process, if done with the intention to contribute to the aesthetic quality of the building itself. In this paper we discuss certain interventions on the tiled triangular faces of the CC II by regular triangles and hexagons, in order to get patterns applicable in architecture. By using different colors and / or materials of the tiles, we can get solutions that add the decorative layer to the structural one. Examining various solutions, this research focused on the D3 subdivision of the lateral polyhedral triangle (LPT) and in the resulting uniform tilings, searching for the ways to overcome monotony of highly symmetrical patterns. As opposed to exploring the ways of assembling the tiled LPTs with assigned layouts of tiles into shape of the CC II in order to get desired patterns on its surface, this paper explores the creation of various patterns within the existing, formerly obtained uniform tilings (2-uniform, trihexagonal tiling). A couple of conceptual solutions are given, as an illustration of the idea.</p> 2019-05-22T16:21:13+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics DOUBLE-HEART CURVE GENERATED BY AN ORIGINAL MECHANISM 2019-05-22T17:53:52+00:00 Iulian POPESCU Ludmila SASS Alina DUTA Marcela POPESCU Alina Elena ROMANESCU <p>Different variants of cardioids were reviewed and authors decided to an end to focus on the usability of a Double-heart curve. Starting from the geometric information related to its generation, the synthesis of an original generating mechanism was performed firstly, followed by the realization of its structural analysis. Mechanism’s positions were computed and the imposed curve was generated. The variations of certain trajectories were deduced from the corresponding diagrams. The mechanism sizes were modified and a wide class of curves presenting interest from the geometric point of view was obtained. Some mathematical properties of the curves generated by the above mechanism are studied (binormal vector, tangent equation in a current point, normal plane equation, tangent versor, versor of normal to the curve).</p> 2019-05-22T16:31:20+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics THE LOGARITHMIC SPIRAL AND ITS SPHERICAL COUNTERPART 2019-05-22T17:53:51+00:00 Hellmuth STACHEL Giorgio FIGLIOLINI Jorge ANGELES <p>Logarithmic spirals are isogonal trajectories of pencils of lines. From a series of geometric consequences, we pick out a few which are relevant for kinematics: When a logarithmic spiral rolls on a line, its asymptotic point traces a straight line. Hence, wheels with the shape of a logarithmic spiral can be used for a stair climbing robot. When involute spur gears are to be generated by virtue of the principle of Camus, the auxiliary pitch curves must be logarithmic spirals. Two congruent logarithmic spirals can roll on each other while their asymptotic points remain fixed. A composition of two such rollings gives a two-parametric motion which allows a second decomposition of this kind. Some of these properties hold similarly for the spherical counterparts, the spherical loxodromes. For example, when in spherical geometry a loxodrome rolls on a circle, both asymptotic points trace circular involutes. Therefore, spherical loxodromes are auxiliary pitch curves for involute bevel gearing. On the other hand, spherical loxodromes can also be seen as helical curves in the projective model of hyperbolic geometry, where the sphere serves as a Clifford surface. This paves the way for remarkable arrangements of loxodromes on a sphere, e.g., a 3-web.</p> 2019-05-22T16:42:40+00:00 Copyright (c) 2019 Journal of Industrial Design and Engineering Graphics