APPLICATION OF TOPOLOGICAL OPTIMIZATION TECHNIQUES TO STRUCTURAL CRASHWORTHINESS

摘要: The topological optimization of components to maximize crash energy absorption for a given volume is considered. analysis performed using DYNA3D finite element analysis. original solid elements are replaced by ones with holes, the hole size being characterized so-called density (measure reduced volume). A homogenization method used find elastic moduli as function this density. Simpler approximations were developed plastic and yield stress functions density. Optimality criteria derived from an statement densities design variables. resizing algorithm was constructed so that optimality approximately satisfied. novel feature introduction objective based on strain energies weighted at specified times. Each different choice weighting factors leads structure, allowing range possibilities be explored. The applied automotive body rear rail. new equal holes compared absorption.