本文介绍了一种确定平面应变中最大主应变方向的新方法。
This paper introduces a new way for defining the maximum principal strain direction in plane strain condition.
主应变的大小和方向可以表示为一个椭球体。
The magnitudes and directions of the main strain are expressed as an ellipsoid.
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。
The theoretical result shows that the direction of plastic strain increment is determined by the direction of principal stress and stress increment.
分析了内摩擦角、壁面摩擦角对最大主应变率方向的影响。
The influences of the Angle of internal friction, the Angle of wall friction to the direction of principal strain rate are analyzed.
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。
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.
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