摘要
提出了一种利用反射波和透射波响应反求陶瓷脆性材料动态材料本构参数的方法.通过数值模拟分析哑铃形试件在加载和测试中能有效地消除动态应力波的应力集中,从而得到有效的动态压缩强度,因此该文利用哑铃形得到的可靠反射波和透射波响应做反求输入信息.应用遗传算法,根据反射波和透射波响应反求材料本构参数,避免了应力波效应和应变率效应解耦的问题,不必分离结构响应和材料响应,从而快速地获取参数.
A computational inverse technique is proposed to identify the dynamic constitutive parameters of a ceramic brittle material from the reflect wave and transmission wave responses. It＇s verified by simulation the dynamic load test using the dumbbell-shaped specimen can reduce the stress concentration and obtain the effective dynamic compression strength, so the effective reflect wave and transmission wave responses is used for the inverse procedure as the input. The method to use the GA to identify the dynamic constitutive parameters from the reflect wave and transmission wave responses,avoids the problem of decoupling stress wave effect and the strain rate effect, decoupling structure effect and material effect, obtains the parameters rapidly.
出处
《固体力学学报》
CAS
CSCD
北大核心
2009年第3期280-285,共6页
Chinese Journal of Solid Mechanics
基金
国防基础研究项目(A142000166-08)
教育部长江学者与创新团队发展计划项目(531105050037)资助.
