...x 1 sin 2 cos 2 2 2 2 x y xy a a a 二、应变分析图解法——应变圆（ Strain Circle） 2、已知一点A的应变（ ），画应变圆 xy y x , , 2 2 ; 2 - ; a a t s a a a a 1、应变圆与应力圆的类比...
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The strain will shorten his circle each time.
拉紧了，它兜的圈子就会一次比一次小。
This paper makes improvements on the methods of stress circle drawings. And this method can be used to calculate the strain and moment of inertia.
本文对应力圆图解法作了改进，使图解法更直观、更简便。并将改进后的图解法应用到应变、惯性矩计算中。
The theory of slip-line field is an effective method for problems of plane strain of perfect plastic solids, and the circle-fan field is used frequently.
滑移线理论是解刚塑性平面应变间题的一种有效方法，而圆扇形场则是常使用的。
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