The influences of the Angle of internal friction, the Angle of wall friction to the direction of principal strain rate are analyzed.
分析了内摩擦角、壁面摩擦角对最大主应变率方向的影响。
An equation for the calculation of true shear strain was derived from the integration of infinitesimal shear strain in plane shearing process with constant principal shear strain direction.
对切应变主轴不变的平面简单切变过程，通过无穷小应变的积分，导出了真实切应变计算公式。
The theoretical result shows that the direction of plastic strain increment is determined by the direction of principal stress and stress increment.
从理论上说明塑性应变增量的方向不仅与应力的主方向有关，还与应力增量的方向有关。
A great quantity of any Angle strain rosette readings was gathered in structural test, the principal strain and the principal direction were calculated by computer program written in this paper.
在结构试验中采集得到的成百上千个任意角度应变花的读数，可用本文编写的计算机程序确定其主应变及主方向，从而替代了科研人员大量的手工计算。
A great quantity of any Angle strain rosette readings was gathered in structural test, the principal strain and the principal direction were calculated by computer program written in this paper.
在结构试验中采集得到的成百上千个任意角度应变花的读数，可用本文编写的计算机程序确定其主应变及主方向，从而替代了科研人员大量的手工计算。
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