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。
With proper design, the grain flow can be oriented in the direction of principal stresses encountered in actual use.
通过适当的设计，可以使晶粒流动方向与实际使用时的主应力方向一致。
The maximUm difference of failure strength among various principal stress direction is up to 30%.
不同主应力方向的破坏强度最大差别可达30%。
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