SIMULIA Resource Center

A motorcycle fuel tank is regarded as important safety-related part containing flammable fluids. It may lead to life threatening situation if the fluid leaks. Thus apart from general dynamic simulation, the fuel tank should be subjected to lateral impact test. The physics of fluid-structure impact are complex, and modeling of such events requires proper understanding of both fluid dynamics and structural mechanics. The fluid-structure interaction was achieved through arbitrary Lagrangian-Eulerian (ALE) approach in Abaqus. A good correlation was achieved between the deformation of fuel tank in testing and simulation. The focus was to verify whether the fuel tank ruptures under the impact or due to contact with surrounding frame parts.

Customer Papers

Bioresorbable poly(L-lactic acid) (PLLA) stents present a clinically attractive treatment for coronary heart disease, providing a temporary scaffold that resorbs once the artery has healed. Polymeric stents are often mechanically inferior to their permanent metallic counterparts. However, their mechanical properties can be tailored through stretch-blow molding (SBM); a process that induces crystallinity and molecular orientation, subsequently altering the mechanical response of the polymer. This study aims to quantify the variation in mechanical properties of PLLA as a result of the SBM procedure and investigate the functionality of a stent constructed from this polymer.

Customer Papers

In typical engineering applications, mixed convection is simulated using an assumed convection Heat Transfer Coefficient (HTC); but in reality, the HTC depends on various parameters like the orientation of geometry, the flow regimes, the temperature of the body, and the properties of the fluid. This paper describes in detail how to calculate the temperature dependent HTC using FILM subroutine and the simulation results comparison with conjugate heat transfer analysis carried out in Abaqus.

Customer Papers

This paper describes the behavior and subsequent constitutive modelling of a Hytrel thermoplastic elastomer (TPC-ET) for a so-called Jounce bumper, which is a part of the vehicle’s shock absorber system. This component is subjected to large deformations (up to 100% strain) with significant permanent set and loss of stiffness. The objective of the analysis is to predict the component behavior after cyclic loading to obtain the load-displacement response curve of the Jounce bumper in operational conditions. The possibilities and limitations of the hyper-elastic model, including permanent-set and Mullins’ effect are discussed and numerical results compared to the test data from an actual component.

Customer Papers

Bushings are anti‐vibration components used in vehicle suspension systems. They are typically made of rubber between two concentric metallic cylinders. Their analysis requires characterising their complex impedance (dynamic stiffness and phase angle). Their behaviour is often difficult to predict without testing a prototype. The rubber undergoes large strains, usually involving strain stiffening and Mullins effect, time dependency and, possibly, plasticity. Thus the behaviour depends on the loading frequency and amplitude, as well as the preload. To tackle the problem a methodology has been developed that combines Abaqus and Isight.

Customer Papers

COUPLED EULERIAN-LAGRANGIAN ANALYSIS OF NEEDLE INSERTION INTO BIOLOGICAL SOFT TISSUE ACCOUNTING FOR MATERIAL RUPTURE

Solution Briefs

Two example nonparametric optimization cases for AM using TOSCA and ABAQUS are presented. For the first case, we optimized a disc brake caliper, where loading conditions were driven by the master cylinder, the contact areas of the disc rotor, and the envelope limitations within the wheel. The objective function, design constraints, and the targeted design response drove the outer topology of the caliper casting. TOSCA’s topology optimization established the primary geometry, and subsequent validation of the parametric reconstruction was performed in ABAQUS. The resulting optimized geometry removed 62% the caliper bridge volume from areas of low stress and replaced it (as needed) in high stress areas.

Customer Papers

The past decade has seen transformative changes in internal combustion engine technology. Revolutionary technological advances of powertrains include the replacement of traditional gasoline internal combustion engines with smaller displacement engines, the use of turbocharging to make smaller displacement engines more powerful and efficient, and the use of lightweight materials in both vehicle bodies and engines. Furthermore, the federal government’s CAFE standards mandate that OEMs develop more fuel-efficient vehicles with lower emissions.

Customer Papers

To include the self-heating effect into the fatigue computation, information regarding hysteresis energy is required. As shown in Fig. 1, the hysteresis energy can be calculated by subtracting strain energies during the loading WL and unloading WU event. The calculated hysteresis energy includes information regarding both plastic deformation together with damage induced dissipations.

Customer Papers

Aquaplaning of automobile tires simultaneously incorporates various physical phenomena some of which are challenging to model with computer-aided simulation tools. Among those are complex patterned topology and rotational movement of tire, small clearance between ground and tire, free surface flow of water and air and inevitably the elastic nature of tire body and effect of its deformations on fluid flow characteristics.In order to overcome these challenges, Abaqus FE software from SIMULIA and FlowVision CFD package from Capvidia are strongly coupled for bidirectional fluid structure interaction (FSI) co-simulation. This approach is applied to a 205/55/R16 sized tire and same conditions are realized in experimental environment for comparison purposes.

Customer Papers

The SIMULIA Living Heart Human Model provides a unique testing environment where a stent can be deployed virtually in coronary arteries and deformed mechanically during the cardiac cycle. Once the mechanical deformation results are obtained, the longterm durability of the stent can be assessed. The virtual nature of the test provides a physiologically accurate methodology to test new and existing devices without exposing patients to unnecessary risk.

Solution Briefs

This paper describes the material behavior for different families of materials of the DuPont product offering, the performance of a selection of different material models for these materials using the extensive possibilities available in Abaqus, and the collaboration between DuPont and Simulia to advance the developments for a more accurate prediction of their behavior. In addition to the topic of modelling, the challenge of resource-effective data generation, state-of-the-art laboratory testing and corresponding data management on a global scale is discussed.

Customer Papers