摘要
根据实验资料,板材的 Hill 塑性应变比不一定都是与变形大小无关的常数。为此,本文提出的取值数模。能兼容 Hill 塑性应变比是常量或是变量的情况。对某些材料的应用表明了本数模是适用的,它能表达 Hill 塑性应变比的变化情况。
According to the experimental data the values of Hill′s plastic strain ratio,γ,for different kinds of sheet metals are not at all certain a constant independent fromstrain magnitude.Therefore a general model to calculate γ-value is developed in the presentpaper,it is usable for both of cases that the γ-value is a variable or a constant.The use forseveral kinds of sheet metal shown that this model can rather accurately express the depen-dence of γ-value on strain.
基金
国家自然科学基金 5860304
关键词
塑性应变比
取值数模
变量
plastic strain ratio
variable
model to determine value
