SIMULIA 리소스 센터

Despite increasingly stringent crash requirements, the body structures of future mainstream production cars need to get lighter. Carbon fiber reinforced polymer (CFRP) composites with a density 1/5th of steel and very high specific energy absorption represent a material technology where substantial mass can be saved when compared to traditional steel applications. BMW have addressed the demanding challenges of producing several hundred composite Body-in-White (BIW) assemblies a day and are committed to significant adoption of composites in future vehicle platforms, as demonstrated in the upcoming i3 and i8 models. A next step to further integrate composites into passenger cars is for primary structural members, which also perform critical roles in passive safety by absorbing large amounts of energy during a crash event.

White Papers

This paper reviews the structural optimization of a cleat from a Springfree Trampoline. In this innovative trampoline, instead of using metal springs the mat is suspended on flexible rods attached to cleats made of fibre glass reinforced polypropylene. A physical testing device was built which applies the load from a rod at the centre of the cleat and supports it at the sides. Nonlinear simulations were used to replicate this experiment and evaluate the effect of changes in the cleat geometry before prototyping. The density and orientation of the glass fibre has an effect on the anisotropic material properties and orientations. Also residual stresses have an effect on structural performance. Therefore an injection simulation was performed using MoldFlow.

Customer Papers

Honeycomn core sandwich plates and shells possess significant advantages over monocoque construction and are widely used in the aerospace, naval, railway, and building industries. In this Technology Brief, we describe an approach for modelling impact on honeycomb sandwich structures using the new plug-in and Abaqus/Explicit. Very good agreement between the numerical results and experimental data is demonstrated.

Tech Notes

XFlow is a particle-based Lattice Boltzmann technology solver for high fidelity Computational Fluid Dynamics (CFD) applications as a part of SIMULIA’s Fluids Simulation portfolio. XFlow offers multiphase and moving parts modeling capabilities specially focused on lubrication workflows such as gearboxes and electric motor drives. Regardless of the system complexity, gear types or lubrication method, XFlow provides detailed insight into the system performance. Lubrication simulation can reduce the number of physical tests, reducing development times and costs. It also provides quantitative predictions for results like wetted area and churning losses that can be very difficult or impossible to measure experimentally.

Brochures

This paper describes the calibration process for uncoupled material model of ductile damage by Johnson-Cook and Rice-Tracey that is implemented in FE package Abaqus. As the work was supported by the grant “Identification of ductile damage parameters for nuclear facilities”, calibration was done for typical steel used in nuclear power plant industry. The project includes both design and realization of experiments, and application of experimental outputs in calibration process of material constants of mentioned ductile damage models. Calibration process of material model uses fifteen types of experimental specimens corresponding with literature. The result of the calibration process was verified through the comparison of FE simulation of each specimen with experimental response. As the material model describing ductile damage within the wide range of stress states was searched in this project, the model was tested on a several another specimens which exhibit higher stress concentration.

Customer Papers

Mechatronic systems encountered in the power and automation industries exhibit very complex behavior for a variety of applications. These problems require solutions derived from diverse physical phenomena, and hence are considered to be multiphysics problems. One such problem includes computing the coupled electromechanical response of electroactive polymer actuators. Due to the complex nature of the problem, obtaining the transient response of electroactive polymer actuator-enabled mechanical systems is a computationally expensive task. In this study, we investigate how multi-GPU acceleration using Abaqus/Standard 6.12 may improve the overall simulation speed.

Customer Papers

In this Technology Brief we demonstrate the modeling of an introduction heated fuser using the co-simulation functionality of Abaqus/Standard. Electromagnetic and heat transfer analyses are co-simulated to compute the temperature history of the fuser roller. The advanced meshing capabilities of Abaqus/CAE are utilized to generate the type of high quality mesh required for computing eddy currents in very thin conductors.

Tech Notes

For fiber reinforced parts the consideration of anisotropic material behavior is required to receive reliable results. In the scope of this fact a procedure is described how to consider these effects in terms of process-structure interaction and how to achieve possible benefits such as weight reduction and shorter development cycles shown for examples of the industry . The developed procedures show how to consider the anisotropic mechanical behavior of injection molded short-fiber-reinforced plastics parts in FE analysis. It is shown how the existing information, which is provided by injection molding simulation software, can be processed and transferred into mechanical simulation models. The procedure is outlined with practical applications.

Customer Papers

The weight reduction of components and systems is of utmost importance in the automotive industry. Reducing weight translates into higher performance and lower fuel consumption. In this paper, we suggest an optimization process for linear and nonlinear load cases of car body. In order to achieve this goal without sacrificing the current performance of selected model, we use Abaqus Topology Optimization Module (ATOM).

Customer Papers

Caterpillar Rolls to Success with FEA

Community News

Increasing customer requirements concerning product quality (e.g. dimensional tolerances, mechanical properties) in heavy steel plate production, require permanent enhancement of online control systems. Focusing on the main production steps “hot rolling” and “accelerated cooling“, the prediction of the local thermomechanical behavior applying physically based modeling techniques is of vital importance.

Customer Papers

Numerical methods using Abaqus to simulate welding processes have been available for several years. These methods typically are based on arc welding procedures where one is depositing a bead or beads and the interest is in the thermal/stress history in the local heat affected zone. The significant thermal cycle found during welding does introduce residual stress in the structure. This residual stress must either be managed with a post weld heat treatment or the welding process and variables must be adjusted to minimize residual stress.

Customer Papers