摘要
为了确定抗爆设计中材料的最大许用塑性应变值 ,以单向受拉的矩形薄板为研究对象 ,假定板宽和厚度方向的变形相等 ,利用塑性变形的体积不变理论 ,通过等效应变的思想 ,提出了一种以延伸率为基本变量的材料合理许用应变值的确定方法·利用ANSYS软件对纯铝圆板在周边全约束、承受均布爆炸模拟载荷作用下的破坏变形进行了有限元数值模拟计算 ,当计算得到的板内最大等效应变接近本文提出的极限塑性应变值时 。
In order to determine the ultimate allowable plastic strain in explosion pressure shock resistant design(EPSRD) method,a rectangular thin plate subjected to stretch in one direction was investigated,as an example. The strains in thickness and width direction were supposed to be the same. By means of constant volume assumption during plastic deformation,a method to determine the maximum strain was suggested based on an equivalent true strain. Using ANSYS commercial code a set of FEA were conducted for a circular aluminum plate to check the method. The plate is fully constrained in circumferential boundary and is uniformly pressurized. When the calculated maximum equivalent strain in the plate approaches the value designed by the method,it is found that the calculated deformation just before rupture is very similar to Pilkington′s experimental results.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第7期697-699,共3页
Journal of Northeastern University(Natural Science)
基金
辽宁省科技攻关资助项目 (992 2 90 0 4)
关键词
粉尘/气体爆炸
防爆设备
抗爆设计
极限塑性应变
dust/gas explosion
explosion proof equipment
explosion pressure shock resistant design
ultimate plastic strain
