Keresés
Keresési eredmények
-
Optimization of the Sheet Metal Base of a Toggle Clamp Using Finite Element Method
266-273Megtekintések száma:203Optimization relates to the ultimate yield strength and the maximum stress incident on the current model under critical working conditions and finds through iterative processing a way to compensate for the strength requirement without going beyond the desired mass limits. In this paper, the horizontal sheet metal base of a horizontal toggle clamp is optimised for mass reduction using the finite element analysis in the computer aided design software. The sheet metal base material is the ANSI32 Steel. In the design software, it is designed with the thickness of 7 mm and it is intended to support a workload of up to 750 N. The constraints were a fixed point added at all the holes and at the bottom surface of the sheet metal base. A number of iterations were made for the 750N loading force across the base plate to run the simulation. For optimization, the aim was to minimize the mass of the base plate. The design parameters were Von Mises, factor of safety and displacement. The variables were the slots’ width and material thickness along the mid-surface of the sheet metal. The mass was reduced by more than thirty per cent overall.
-
Generative Design of Articulated Rod of Radial Engine
36-47Megtekintések száma:433The constant need for improvement drives humans to look for the best possible option in every field. Computer Aided Design (CAD) is no exception, to follow the best method of designing a product and finalizing it, researchers came up with an idea to generate multiple designs using fixed input values and finalizing the most appropriate one. The objective is achieved using an iterative design process based on algorithms by a specific software. Generative design introduces a new experience based on the Integration of machine dynamics in the manufacturing of objects and about experience. In this work generative design method was investigated on an articulated rod, one of the most important components of the rotary engine, to effectively improve the overall working performance of the engine and enhance its performance by decreasing its mass. Since fuel consumption by the machine can be greatly reduced by lowering the mass, so the goal is to minimize the weight of the rod while mechanical characteristics have to be within the acceptable values. Also, finite element analysis (FEA) was investigated on the part as to ensure the reliability of the rod before and after optimization.
-
Generative Design of a Mechanical Pedal
48-58Megtekintések száma:772Nowadays, there are various tools that support the initial stages of design available to use for engineers, the traditional Computer-Aided Design (CAD) has been implemented in the engineering components design and replaced manual drafting. However, with the advances and the rapid technology development, new trends emerged to cope with this evolution, namely, Generative Design, Topology Optimization, and Generative Engineering Design. The method is based on numerical algorithms that generate a variety of design and modelling options based on the criteria and constraints set by the designer to allow further design exploration. Proposed in this paper is an implementation of the generative design of a mechanical pedal with further finite element analysis.
-
Finite Element Analysis of Cellular Structures Using Ansys
197-204Megtekintések száma:219Additive manufacturing (AM) is a process in which the product is composed of overlapping layers of a material that is added using devices such as 3D printers. Its process has been evolving for decades and nowadays it can be used for several applications and with different materials. One modern usage is for medical and dental purposes. Since it became possible to print metal, it has been a good solution for bone implants, once it must be done with biomaterials and can now replicate the bone structure, for that unit cells should compose the implant. Both conditions are now possible to be achieved by AM, and the current study will analyze, using finite element method, the possibilities to create specimens for tests which the final product would result in a 3D printed bone implant.
-
Direct Optimization of an Automotive Sheet Metal Part Using ANSYS
134-142Megtekintések száma:385Optimization of automotive parts nowadays is mainly used to design lightweight and cost-effective vehicle parts in order to improve the cost and efficiency. In this research, a sheet metal part was taken into consideration and optimized using direct optimization module in ANSYS to evaluate the process. An initial Finite Element Analysis (FEA) was done on the sheet metal part by adding forces and constraints in order to initiate direct optimization. The purpose of the optimization is to minimize the mass of the sheet metal part and maintaining a certain Factor of Safety (FOS) by automatically modifying the sheet thickness and the dimension of the side holes. As a result, the best candidate point with 23% mass reduction was found which complied with FOS value was selected for optimal geometry.
-
Study on Nonlinear Behavior of Variable Thickness Plates
72-80Megtekintések száma:37The analysis of variable-thickness plates is much more complicated than that of uniform-thickness plates because variable coefficients occur in the equations. In reality, this analysis is of great interest in various engineering disciplines, such as civil engineering, aerospace engineering, machine design, and so on. Although there is extensive literature on analyses of plates with constant thickness, a rather limited amount of technical literature is available on the solutions to problems dealing with plates with nonuniform thickness. The reason is that the analytical solutions meet insurmountable difficulties. Besides, the nonlinear analysis process also faces more difficulties than the linear analysis of structures. For these reasons, the nonlinear behavior of variable-thickness plates based on a finite element procedure is presented in this study. Although the topic is not special, it will help the engineer have a specific view of the nonlinear bending of the plate with variable thickness. This survey will be based on the change in geometrical parameters. Numerical solutions are then presented to verify the simplicity of this proposed procedure.
-
Mindkét végén befogott gerenda tehetetlenségi főirány körüli hajlító rezgéséhez tartozó sajátfrekvenciájának vizsgálata egyszabadságfokú modell és végeselemes számítás alapján
69-79Megtekintések száma:175Jelen cikkben mindkét végén befogott, téglalap keresztmetszetű gerendák hajlító rezgéséhez tartozó sajátfrekvenciák számítási módszereivel foglalkoztunk. Az említett sajátfrekvenciákat a gerenda egyszabadságfokú modelljén analitikusan, valamint a térbeli szilárdtest-, és a térbeli rúd modellek esetében végeselemes modális rezgésvizsgálattal határoztuk meg. Bemutattuk az analitikus modell jellemzőinek kiszámításának módját, majd egy konkrét példa esetében kiszámítottuk a sajátfrekvenciát. Ismertettük a modális jellemzők fogalmát, a továbbiakban az előbbi gerenda szilárdtest-, és rúd modellje alapján meghatároztuk a sajátfrekvenciáját. A bemutatott módszerekkel további 11 esetben számítottuk ki, és vetettük össze a különböző módon felvett modellekhez tartozó megoldásokat.
-
Mechanical Design and Finite element Analysis for Acetabular cup
23-35Megtekintések száma:110Hip replacements typically consist of a four-part piece. Our research will focus primarily on the acetabular component. Several different types of materials can be used when creating a hip replacement implant ranging from plastic to titanium. Different materials are used to accommodate for allergic reactions or circumventing potential health risks. Aside from the material, the size of the components plays a factor in terms of durability; a larger diameter head might avoid dislodgement though it could increase wear and tear on the stems through constant friction. A patient’s force applied to the hip replacement is usually measured through a number of physical assessments. Finite element analysis (FEA), a computer-based method of data observation, allows for us to accurately simulate hip forces and their impact on the hip replacements. Through this, it becomes easier to predict and calculate the performance of specific designs. Generative systems can also be used to support performance analysis and optimization through assessing a multitude of cases, many of which apply in real-world scenarios. By applying both systems, we designed and modeled an acetabular cup that when measured decreased the mass from 129 grams initially down to 52 grams, a 60% decrease in total mass. Furthermore, the design we created lessened the trauma on the piece through distributing force across the entirety of the piece rather than specific segments only. This shows an increased durability and life expectancy when compared to usual acetabular cups.
-
Finite Element Software for Rubber Products Design
13-20Megtekintések száma:281Automotive rubber products are subjected to large deformations during working conditions, they often contact with other parts and they show highly nonlinear material behavior. Using finite element software for complex analysis of rubber parts can be a good way, although it has to contain special modules. Different types of rubber materials require the curve fitting possibility and the wide range choice of the material models. It is also important to be able to describe the viscoelastic property and the hysteresis. The remeshing possibility can be a useful tool for large deformation and the working circumstances require the contact and self contact ability as well. This article compares some types of the finite element software available on the market based on the above mentioned features.
-
Fémhabok képi elemzése és geometriai modellezése
89-92Megtekintések száma:101A mérnöki kutatások egyik nagy kihívása a mára már széles körben alkalmazott fémhabok geometriai
modellezése, valamint a megalkotott 3D-s modell numerikus szilárdságtani vizsgálata. A fémhab struktúrája
meglehetősen bonyolult, így a valóságot jól megközelítő CAD modell előállítása önmagában is komoly mérnöki
feladat, annak adott terhelésre történő végeselemes szimulációja pedig a kutatások középpontjában áll. A projekt
ezen részének célja az előzőekben tárgyalt témakörökre vonatkozó nemzetközi szakirodalom kritikai elemzése és az
eredmények adaptálási lehetőségei, továbbá egy térfogatelemzési eljárás bemutatása a fémhab celláival
kapcsolatban. -
Topology Optimization of Automotive sheet metal part using Altair Inspire
143-150Megtekintések száma:783In an optimization problem, different candidate solutions are compared with each other, and then the best or optimal solution is obtained which means that solution quality is fundamental. Topology optimization is used at the concept stage of design. It deals with the optimal distribution of material within the structure. Altair Inspire software is the industry's most powerful and easy-to-use Generative Design/Topology Optimization and rapid simulation solution for design engineers. In this paper Topology optimization is applied using Altair inspire to optimize the Sheet metal Angle bracket. Different results are conducted the better and final results are fulfilling the goal of the paper which is minimizing the mass of the sheet metal part by 65.9% part and Maximizing the stiffness with Better Results of Von- Miss Stress Analysis, Displacement, and comparison with different load cases. This can lead to reduced costs, development time, material consumption, and product less weight.
-
Topology Optimization of Acetabular Cup by Finite Element Simulation
22-34Megtekintések száma:417Hip replacements typically consist of a four-part piece. Our research will focus primarily on the acetabular component. Several different types of materials can be used when creating a hip replacement implant ranging from plastic to titanium. Different materials are used to accommodate for allergic reactions or circumventing potential health risks. Aside from the material, the size of the components plays a factor in terms of durability; a larger diameter head might avoid dislodgement though it could increase wear and tear on the stems through constant friction. A patient’s force applied to the hip replacement is usually measured through a number of physical assessments. Finite element analysis (FEA), a computer-based method of data observation, allows for us to accurately simulate hip forces and their impact on the hip replacements. Through this, it becomes easier to predict and calculate the performance of specific designs. Generative systems can also be used to support performance analysis and optimization through assessing a multitude of cases, many of which apply in real-world scenarios. By applying both systems, we designed and modeled an acetabular cup that when measured decreased the mass from 129 grams initially down to 52 grams, a 60% decrease in total mass. Furthermore, the design we created lessened the trauma on the piece through distributing force across the entirety of the piece rather than specific segments only. This shows an increased durability and life expectancy when compared to usual acetabular cups.
-
Thermoelastic Problems of Multilayered Spherical Pressure Vessels Subjected to Axisymmetric Loading
106-115Megtekintések száma:109This paper deals with the linear thermoelastic analysis of functionally graded multilayered spherical bodies subjected to constant mechanical and thermal loading. The temperature field is arbitrary function of the radial coordinate, the material properties and the radial body force vary according to power law functions along the radius of the sphere. An analytical method is presented to calculate the displacements and stresses within the multilayered spherical body. The method is expanded to tackle the problem of spherical bodies made from radially graded materials with temperature dependent material properties. The results are compared to finite element simulations and other methods.
-
Fémhabstruktúrák elemzése és geometriai modellezése
145-152Megtekintések száma:121A mérnöki kutatások egyik nagy kihívása a mára már széles körben alkalmazott fémhabok geometriai modellezése, valamint a megalkotott 3D-s modell numerikus szilárdságtani vizsgálata. A fémhab struktúrája meglehetősen bonyolult, így a valóságot jól megközelítő CAD modell előállítása önmagában is komoly mérnöki feladat, annak adott terhelésre történő végeselemes szimulációja pedig a kutatások középpontjában áll. A projekt ezen részének célja az előzőekben tárgyalt témakörökre vonatkozó nemzetközi szakirodalom kritikai elemzése és az eredmények adaptálási lehetőségei, továbbá egy térfogatelemzési eljárás bemutatása a fémhab celláival kapcsolatban.
-
Modeling the Thermal Behavior of Permanent Magnet Synchronous Motors
466-477Megtekintések száma:140The aim of this study is to present a thermal analysis of a permanent magnet synchronous machine based on finite element method. The developed model can be used to predict temperature distribution inside the studied motor during the rated operation. Electromagnetic computation is carried out with the aid of two 2D finite-element (FE) simulations on the cross-section of the PM motor. To analyse the process of heat transfer in an electrical machine, empirical correlations are used to describe the convective heat transfer from the different surfaces of the PM motor. The heat transfer coefficient is determined using dimensionless numbers and Nusselt number. After the loss calculation, the temperatures of the machine are calculated by using 3D finite element method. The results obtained by the model are compared with experimental results from testing the prototype electric motor.
-
Introduction to Design and Analysis of Torsional Vibration Dampers in Vehicle Industry
310-324Megtekintések száma:318The crankshaft of today’s internal combustion engines with high performance output are exposed to harmful torsional oscillations originated from the unbalanced gas and inertial forces. To avoid the fatigue damage of engine components, caused by the undesired vibrations, torsional vibration dampers can be applied. Viscodampers are one type of the torsional vibration dampers, which operational fluid is silicone oil. For cost-effective R&D activities and production, finite element and finite volume numerical discretization methods based calculation techniques must be involved into the engineering work supported by the modern computer technology. The aim of this paper is to provide an insight into the multidisciplinary design and development process of visco-dampers in vehicle industry applications. Four different examples as structural, fatigue, CFD analyses and structural optimization have been introduced in the present work. It turned out from the static structural and fatigue analyses, that the investigated damper has safety factor over the limit for both static structural and fatigue analyses, so it is suitable for the given load conditions. In the structural optimization process 34.36% mass reduction has been achieved. According to the coupled fluid dynamic and heat transfer simulations a rather stagnating air zone evolved between the engine and the damper during the operation, which can cause efficiency reduction of cooling fins mounted onto the housing. In light of the numerical results, the suitable damper position has been determined for the highest heat transfer.
-
Optimáló módszerek alkalmazhatósága járműipari gumitermékek tervezésében
358-363Megtekintések száma:148A gumitermékek tervezése során a velük szemben támasztott követelmények teljesítése céljából általánosan használt a méret, az alak vagy a topológia optimálási módszer. A vizsgált termék alakja a legtöbb esetben igen bonyolult, továbbá működése közben érintkezésbe lép egyéb alkatrészekkel is. Jellemzően nagy deformációnak van kitéve, melyre a gumi alapanyag erősen nemlineáris tulajdonságot mutat. Ezen feladat analitikus megoldására nincs lehetőség ezért azt numerikus úton kell keresni, melynek futtatása igen időigényes folyamat. Ebből adódik a kutatásom célja, mely a különböző optimálási eljárások hatékonyságának és számítási költségének összehasonlítása. Jelen dolgozat célja az elérhető optimáló algoritmusok alkalmazási lehetőségeinek felkutatása járműipari gumitermékek alakoptimálására. Ismertetésre kerül több helyettesítő modellen végzett optimum kereső eljárás továbbá számos direkt kereső módszer is.
-
Egyenes esztergakés élgeometriájának tervezése, modellezése és vizsgálata
11-16.Megtekintések száma:124A publikációban az egyenes esztergakés élgeometriájának és modelljének a létrehozását valósítjuk meg szoftver segítségével a modelltérben. Célunk egy olyan program létrehozása, amely néhány hossz- és szögméret megadásával kiszámítja az annak megfelelő élgeometriát. Ezt drótváz modellként alkotja meg egy olyan fájlformátumban, ami könnyen átvihető a ma használatos CAD szoftverekbe, így ott az esetleges további változtatásokat végre lehet hajtani. Végeselemes-szimuláció segítségével adott technológiai paraméterek és anyagminőség mellett meghatározható egy optimális élgeometria a lehető legjobb forgácsolási viszonyok elérésének érdekében.
