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原文传递 Simulation of a bumper crash test with characterizations of plastic anisotropy and strain rate dependence of the high strength steel sheets

题名：	Simulation of a bumper crash test with characterizations of plastic anisotropy and strain rate dependence of the high strength steel sheets
正文语种：	中文
作者：	Juner Zhu Yong Xia Lingchen Ma Xinqi Wei Qing Zhou
作者单位：	epartment of utomotive Engineering,State Key Laboratory of utomotive Safety and Energy,Tsinghua University,100084
关键词：	High strength steel Crash test Strain rate effect Plastic anisotropy Mechanical test
摘要：	A bumper which consists of two types of High Strength Steels is tested under a speed of 40km/h.To simulate the crash process accurately,the mechanical behaviors of the two steels are studied.Plastic anisotropy is investigated by quasi-static tension tests.Results show that one of the materials is severely plastic anisotropic while another one is almost isotropic.Meanwhile,results of tension tests under 7 different strain rates indicate that both of the two steels have positive strain rate dependence in tensile strength.Therefore,four different model choice and calibration strategies are employed to characterize plastic anisotropy and strain rate effect in the simulation of the bumper crash test in LS-DYNA.Simulation results by different strategies are compared,and it is found that the characterization of strain rate effect is of major importance for the simulation of the bumper crash test.
会议日期：	20140820
会议举办地点：	保定
会议名称：	2014第十七届汽车安全技术学术会议
出版日期：	2014-08-20
母体文献：	2014第十七届汽车安全技术学术会议论文集