逐段线性加载面等向强化时角点处塑性应力应变关系

特雷斯卡屈服条件在等向强化时的强化函数在文献中讨论较少，本文建议了一个强化函数，它能与特雷斯卡屈服函数相匹配，且有效充分的实验基础。它与夸脱理论相结合，得到了在角点处的塑性增量应力应变关系，在角点上剪应力增量与剪应变增量间是单值确定的。

The Stress and Strain Relation of Plasticity on the Corner of the Piece-Wise Linear Loading Surface under Isotropic Hardening

The hardening function of the Tresca yielding criterion under isotropic hardening has been rarely discussed in literatures. A hardening function is put forward in this paper. It can match with the Tresca yielding criterion with comparatively sufficient experimental evidence. Then the increment stress- strain relation of plasticity on the corner of the yielding surface is presented by the Koiter theory which is connected with the above hardening function.