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根据平面应力分析的应力圆法推证出一种判定极值应力平面方位的简捷作图法。其特点是 :简捷、直观、容易掌握。该法还可以推广到平面应变分析主应变方向的判定
According to the plane stress analysis of the circle of stress method to determine a critical plane to determine the extreme location of the simple mapping method. Its features are: simple, intuitive, easy to grasp. The method can also be extended to determine the direction of the principal strain of the plane strain analysis