平面应变条件下主应力轴旋转产生的应变

Strain due to rotation of principal stress axes under plane strain condition

以平面应变条件下的无粘性土为例 ,提出了一个确定主应力轴旋转条件下主应变增量与主应力方向之间非共轴角的简单方法 ,推导出了主应力轴旋转产生的应变增量的计算公式 ,通过试验验证了方法和公式的适应性。

Taking cohesionless soil under plane strain condition as an example, a simple method to determine the angle of the non-coaxiality between directions of the principal strain increment and the principal stress is proposed, and the formula to evaluate the strain increments due to the rotation of principal axes is derived. At last, the applicability of the previous method and the formula is investigated based on the experimental results.