SPH法による弾塑性解析手法の検討 : 第1報,2次元小変形問題

概要

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SPH (Smoothed Particle Hydrodynamics) method, which is one of the meshless analysis, has been proved as a powerful tool for structural analysis especially in hyper-velocity impact problems. Recently the method has been shown to have much potentials for general dynamic structural problems, however, the applications have not been sufficient because the theory for plastic analysis in SPH has not fully developed. In this study elastic-plastic analysis of SPH in 2 -dim has investigated to clarify the accuracy and characteristics of this method. Two elastic-plastic models have been used. One is so called [D^p] matrix method (strain-rate independent model) and another is Johnson-Cook Model (strain dependent model). The results have showed that elastic-plastic SPH analysis has good accuracy in comparison with FEM and presented reasonable solutions in time-dependent and time-independent problems in 2 dimensions.
2002-05-25