应力面 meaning in English

stress plane
stress surface

Plastic stress surface
塑性应力面
The energy equilibrium equation and the relation between plastic work and the critical stress surface are given
给出了临界状态下的能量平衡方程及塑性功与临界应力面的关系。
It points out that the principal strain rate is coaxial with the principal stress at critical state and is independent of the critical stress surface
指出散粒体临界状态下的主应变率与主应力共轴，而与临界应力面形状无关。