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11th International LS-DYNA Conference

Variable Screening Using Global Sensitivity Analysis
Tushar Goel, Christoph Maurath - Livermore Software Technology Corporation
The cost of optimization increases with the dimensionality of the problem irrespective of using metamodels or direct methods. It is recommended to explore the opportunities to reduce the number of variables. One method to reduce the dimensionality is to fix the variables that do not influence the response significantly. ANOVA based on polynomial response surfaces is often used to identify the least important design variables. The global ...
Vehicle Structures Experimental Analyses
Moisey B. Shkolnikov
This paper is a summary of previous developments, publications and usage of special strain gages sets (referred to here as experimental finite elements, FEs) in experimental analyses of vehicle structures. The experimental FEs developments were based on Structural Mechanics, Math Statistic theories and experience of their applications in vehicle structures analyses and tests. The summary’s objective is to describe the LS-DYNA® optional ...
WorldSID 50th vs. ES-2 A Comparison Based on Simulations
Sebastian Stahlschmidt, Alexander Gromer - DYNAmore GmbH
Matthias Walz - Daimler AG
For testing side impact performance of vehicles two recent male-sized dummies are available. Currently only the ES-2(re) is used in regulations and consumer test. It is expected that the WorldSID will be used for some load cases as substitute or in addition to the ES-2(re). Since only limited experience with the WorldSID is available, simulation is a ideal tool to face the upcoming challenge. The comparison employs detailed finite element ...
XFEM and EFG Cohesive Fracture Analysis for Brittle and Semi-Brittle Materials
Yong Guo, C.T. Wu - Livermore Software Technology Corporation
The finite element analysis of dynamic fracture in solids and structures is challenging due to the modeling of arbitrary crack growth in the continuum domain. The well-known mesh size and mesh orientation dependences add more difficulties into the analysis of this type of problems. In this presentation, we are going to introduce two numerical methods in modeling the dynamic fracture in brittle materials for solid and structures in LS-DYNA®. ...