松软固体的塑性应力计算

Calculation of stress in plastic spongy solid

在边界积分方程离散的基础上，建立了适用于一般松软固体的弹塑性本构关系；给出了三维弹塑性矩阵的形成及推导过程；对屈服准则、迭代过程等作了较深入的探讨，设计了三维边界元计算机程序．

This dissertation has set up an elastoplastic constitutive law suitable for spongy solid in general. It introduces the process of 3 D elastoplastic matrix, makes an investigation of yield criteria and the process of stratification, and completes a practical program.