strain-gradient

Two kinds of size effects on micro deep drawing are investigated, which can be explained by surface layer model and strain gradient model.

另一个为考虑应变梯度效应的模型，该模型在已有的材料特征基础上引入了尺度效应。

The second shear strain gradient and the function reflecting the effect of strain rate are introduced into the yield function of classical elastoplastic theory.

在经典弹-塑性理论的屈服函数中引入应变梯度及考虑应变率效应的函数。

Then, we introduce a strain gradient theory and its main applications, in which no high-order stresses are included.

其次主要介绍了不含高阶应力的一类应变梯度理论及其应用；