SIMULIA에 대해 필요한 모든 것을 찾아보세요
We present a finite element model which takes into account the dynamic interaction between a truck and the bridge over which it is passing. The truck-bridge system presented by Marchesiello (1999) and also used by Zhu (2002) is employed to verify our model. The vehicle is a 3D truck with seven degrees of freedom. The bridge is a continuous three-span slab.
Customer Papers
The use of iSight to automate Inergy's simulations related to automotive plastic fuel tank development is highlighted by three examples: 1. the static venting simulation, where the low added value part (finding the position of valves on the tank so that the customer's specifications are fulfilled) is automated. This allows the expert to focus on higher added value tasks. 2. the tank aging simulation, which consists in computing the permanent deformation of the fuel tank caused by the plastic creep. ISight permits to easily investigate different tank architectures at early stage of development. 3. the blow molding simulation is simplified so that non-simulation specialists are able to run it. This eases the access to simulation for technical experts.
Customer Papers
A time-independent constitutive model for HY-80 (High Yield) steels with a yield plateau is outlined. The model couples the non-linear kinematic hardening concept with a memory surface in the plastic strain space, to account for progressive cyclic hardening/softening, and a pseudo memory surface in the deviatoric stress space, to correctly describe the plateau response. The model is incorporated into Abaqus/Standard through a UMAT. The performance of the model is validated against experimental data.
Customer Papers
This paper presents the analyses techniques using ABAQUS to identify and prevent typical failure modes seen in shock and vibration testing. The analysis techniques are (i) Steady state response with base excitation for vibration requirement using implicit code, and (ii) Dynamic, explicit with impulse load at the base for shock using explicit code. These analysis methods are being used at Motorola to reduce overall development cycle time required to introduce a new product to market.
Customer Papers
For the buckling problem of circular cylindrical shells under axial compression, a number of experimental and theoretical studies have been made by many researchers. In the case of the very thin shell that exhibits elastic buckling, experimental results show that after the primary buckling, secondary buckling takes place accompanying successive reductions in the number of circumferential waves at every mode shift on systematic (one-by-one) basis. In this paper, we traced this successive buckling of circular cylindrical shells using the latest in generalpurpose FEM technology.
Customer Papers
Automotive vehicles undergo various ranges of road loads according to the driving conditions. Sometimes it experiences unusually large overload such as pot-hole impact or curb strike whose forces are several times of the vehicle weight. Those overloads may induce plastic deformations at some components and these plastic deformations reduce the fatigue life of the components. In some cases, the fatigue crack initiation points may be changed due to the residual stresses which were generated by the overloads. This study was performed to assess the effects of overload on the fatigue behavior of automotive suspension components and to develop a fatigue analysis methodology predicting the fatigue life under overload.
Customer Papers
The pressure on the oil and gas industry to meet the growing demand for energy when faced with fewer technical professionals, more complex reservoirs, and increased global competition is making it more critical than ever before for operators to make quick, accurate, and informed field development decisions that efficiently leverage the expertise of seasoned technical professionals. With experienced, technical professionals in short supply, the industry is looking for information technologies that can extend the reach of technical experts and better ground highlevel business decisions in the scientific evaluation of the asset.
Customer Papers
In order to analyze the stress at the thread roots of a bolt of an automotive engine under an operating condition, we developed a stress analysis method for it, which consists of a multibody dynamics analysis, a linear transient analysis and nonlinear static analyses. It is able to consider the motion of bolted structures,the contact behavior and the plastic deformations with practical calculation costs. In this paper, we showed that the developed method is applied to inline 4 engine systems as an example.
Customer Papers
GM Chassis CAE has used ABAQUS successfully for many years. In the past most problems examined were more traditional durability and strength analyses of metallic structural components. Recently we have used ABAQUS/Explicit to great advantage to assess and solve for a wider range of component materials and loadings such as elastomers, sealing and impact. This presentation highlights some recent examples of these types of analyses, as well as sharing some general conclusions and lessons learned from these studies.
Customer Papers
In this paper, analytical surface shear stress distributions for elastically similar spheres under quasi-statically applied normal and tangential loads are compared to those obtained using Abaqus/Standard 6.9. The agreement is quite good, with both methods predicting seemingly paradoxical features such as shear stress free portions of the contact zone, as well as non-zero shear stress distributions that result in zero net tangential force. The finite element results for elastically dissimilar spheres, for which no analytically-based solution exists, show significant differences in the shear stress distributions from those seen for elastically similar materials, due to the additional radially symmetric shear stress caused by the elastic dissimilarity.
Customer Papers
A procedure for calculating Linear Elastic Fracture Mechanics (LEFM) Stress Intensity Factors associated with postulated flaws located within regions of residual stress that result from large strain forming processes is presented. The procedure is validated by analyzing a structural system with residual stresses representative of a plane strain 3-point bending configuration, for which a known solution exists. The procedure is also applicable to the analysis of flaws in residual stress fields that result from in-service loads leading to large plastic strains, as illustrated by the determination of stress intensity factors associated with a postulated flaw in a deployed coronary stent.
Customer Papers
An alternative remeshing methodology for 3D Abaqus explicit analyses which utilizes mesh mapping is presented. Excessive element distortion in 3D large deformation analyses necessitates remeshing, however in Abaqus explicit, the standard 3D remeshing techniques limits the analyst’s choice of element type. The presented technique allows remeshing of 3D perfectly plastic fully integrated higher order elements. The remeshing occurs in regions of high equivalent plastic strain or high equivalent plastic strain rate. The remeshing procedure maps the old boundary conditions, stress, and inelastic strain from the old distorted mesh.
Customer Papers
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