SIMULIA Resource Center

An automated framework for numerical simulation is developed to estimate the probability of brittle failure for a cell-phone display subjected to accelerated life cycle testing (ALT). SIMULIA Isight and the Abaqus-Python interface are used to predict the field-failure rate (FFR). The framework’s adaptable definition of inputs and output parameters can be extended to other common failures in handheld devices such as the denting and cracking of the housing walls, the cracking and delamination of the solder-joints in surface mounted devices, and the shock based criteria for packaged components.

Customer Papers

Composite materials continue to rapidly improve in terms of structural performance. These materials offer the promise of significant weight reduction in many products—particularly aerospace structures, where weight minimization is critical to both cost and overall performance. Despite this potential, however, several challenges prevent composite materials from being used as widely and pervasively as traditional materials. Preliminary design concept evaluation of a structure with a novel material is difficult without a lengthy, expensive test program to provide the requisite material properties, but manufacturers are justifiably reluctant to invest this time and money without confidence that the material under consideration merits such expense.

Customer Papers

VOLVO TRUCKS NORTH AMERICA

Fact Sheets

The main functions of rolling bearing cages are the separation and distribution of rolling elements. The cage is not directly affected by the loads acting on the bearing but by the dynamic interaction with other bearing components. Critical conditions for the cage can occur during operating conditions with shock loads or vibrations. For the strength assessment of the cage, a dynamic simulation is often necessary. One option is a dynamic FEA of the whole bearing, however, that can be very expensive. A model reduction is possible by means of adequate connector elements. An alternative to that is a multi body simulation (MBS) of the bearing and a subsequent dynamic FEA of the cage for a single impact with the impact speed result of the MBS. This allows an effective fatigue analysis for the cage. The outcome could be verified by measurement of cage motion and strains on different test rigs. As a result, this shows that Abaqus/Explicit is a powerful tool for the analysis of dynamically loaded cages.

Customer Papers

This work is considered to overview the applicability of modal dynamic method in seismic and aircraft crash analysis of NPP structures. Soil-structure interaction is taken into account; problem of 20%-limiting of modal composite damping is researched; results of different methods (Direct integration method, modal method, and upgraded modal method, when projected damping matrix is fully populated) are compared on test model and on real structure model. Simple test was solved theoretically and in ABAQUS, global damping matrices, acquired by modal and direct integration methods are compared. It is worth noting that both methods are approved for use in dynamic analysis of NPP structures by ASCE 4-98, but in most cases direct integration method gives more conservative results.

Customer Papers

This document gives an overview on the coupling between Abaqus and Dymola. Then a practical example of co-simulation is developed. This example will focus on decreasing vibration and improving positioning accuracy of a gantry robot.

Customer Papers

Representing MIG welds in FEA models is often a very laborious task in preparing the FEA Models. Traditional techniques range from TIEs to shells to solid elements. Using TIEs can be subject to mesh density and parameter choices for the TIE. Shell and solid representation can require significant geometric preprocessing. Presented here is a technique that uses Abaqus spot welds to approximate MIG welds. It will be shown that this representation of welds has high accuracy with minimal pre-processing required and insensitivity to mesh density. An Abaqus/CAE plug-in has been developed to automate this process. Examples comparing stiffness, stress and strain will be shown.

Customer Papers

The present work describes a multiscale methodology which has been developed for modeling of impact damage in the laminated composite structures. The methodology employs the High Fidelity Generalized Method of Cells (HFGMC) micromechanical model for the prediction of the local stress and strain fields, within the representative unit cell of the unidirectional composite material. The Mixed Mode Continuum Damage Mechanics (MMCDM) theory has been utilized to model damage within the composite unit cell at the micromechanical level. The MMCDM theory enables modeling of the microdamage nonlinearities at in-plane shear and transverse compressive loadings of the composite plies. Employment of the multiscale approach enables the application of the MMCDM damage model in structural analyzes.

Customer Papers

Simulation for Designers provides connected, powerful and collaborative simulation solutions on 3DEXPERIENCE platform, available on-premise and on-cloud. Performing simulation during the design phase empowers you to accelerate innovation by solving engineering challenges for your CATIA designs with full data associativity.

Flyers

Reinforced hoses are used across industries, including hydraulic systems, fluid transport, and mooring systems. These systems consist of multiple layers of reinforcement, both woven and single fibers or cords, embedded in elastomeric matrices. This paper presents an example of reinforced hose simulation and discusses the challenges of embedding highly anisotropic reinforcements in a nonlinear rate-dependent elastomeric material. The discussion includes modeling the microscale interaction between individual reinforcements with a rubber matrix, particularly with respect to asymmetry between compression and tension, and small scale relaxation effects. The simulation results are compared with measurements of actual hose behavior.

Customer Papers

Electrostatic Discharge (ESD) is a phenomenon where static electricity discharge happens between two electrically charged objects when they come into contact with each other, such as the human body and an electronic device. This high voltage ESD pulse generated from the human body can enter the electronic device if touched, causing damage to IC circuits inside it. With increasing operating speed and decreasing operating voltage of electronic components the problem of ESD is a severe source of interference which can produce damage, upset or failure in electronic systems.

White Papers

Nonlinear Finite Element Analysis is performed to investigate the crack of a prestressed double tee canopy beam due to thermal expansion. Concrete damage plasticity material model is employed to detect the potential crack of concrete beam caused by thermal loads. The bond between pre-stressed strands and concrete is modeled by tie, cohesive element and friction. Explicit modeling approach is selected due to the significant discontinuity in the threedimensional model. The potential crack pattern from FEA modeling indicates the actual crack as observed in field quite well.

Customer Papers