摘要
在材料的应力应变关系中,本文对剪切部分的线性弛豫近似和线性硬化效应作了简化讨论,其中对动态和静态的加载、卸载过程讨论的更多一些,从而得到一个适合于弹-粘塑性材料以及加载、卸载过程都可用的本构关系,并将其用于一维平面波的传播过程,计算了飞板碰靶后应力、应变的分布,结果同等人的工作相符。
In the stress-strain relations of material, the linear relaxation approximation and hardening effects for shear stress arid strain are discussed, especially the static and dynamic loading and unloading processes are studied in more detail in this paper. The constitutive relation which is suitable for elastic-viscoplastic material with loading-unloading processes is presented.We make use of the relation and under the condition of one-dimensional planar wave propagation to calculate the profiles of the stress and strain in the target which is collided by a flying plate. The results are in agreement with that published by V.E.Romanchenko, G. V.Stepanov. Moreover, the compression and tension processes of the material are described well.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1989年第2期150-156,共7页
Explosion and Shock Waves
关键词
弹塑性
材料
平面波
应力
弹塑性波
dynamic stress, dynamic property of material, elastic-plastic wave.
