高速冲击条件下玻璃中破坏波的损伤累积模拟  

A Damage Accumulating Modeling of Failure Waves in Glass under High Velocity Impact

作　　者：刘占芳[1] 姚国文[1] 詹先义[1] 

机构地区：[1]重庆大学工程力学系,重庆400044

出　　处：《应用数学和力学》2001年第9期983-987,共5页Applied Mathematics and Mechanics

基　　金：国防科技重点实验室基金资助项目(99JS75 2 2 JW2 0 0 1)

摘　　要：分析了玻璃介质在高速冲击条件下低于Hugoniot应力弹性极限时的破坏波现象 ,在实验现象分析的基础上提出了一种由偏应力冲量决定的损伤累积模型 ,模型中采用了Heaviside函数来描述材料内部的破坏延迟现象 ,分析了玻璃介质中破坏层的性质、破坏波的传播机制及其动态特征 。The failure wave phenomenon was interpreted in glass media under the high velocity impact with the stress levels below the Hugoniot elastic limit. In view of the plate impact experimental observations a damage_accumulating model predominated by the deviatoric stress impulse was proposed while Heaviside function was adopted in the damage_accumulating model to describe the failure delay in the interior of materials. Features of the failure layer and propagation mechanism as well as their dynamic characteristics were further presented. The reduction in failure wave propagation speed is pointed out as the reflected rarefaction waves reflect again from the failure layer boundary.

关 键 词：高速冲击 破坏波 损伤累积模型 玻璃介质 Hugoniot应力 Heaviside函数 

分 类 号：O347.3[理学—固体力学]