关于强度理论的探讨

AN APPROACH TO STRENGTH THEORY

本文主要依据弹性体在外力作用下发生变形时,各点处产生弹性应变能的概念,探讨了材料力学教科书中常用的强度理论的提法,提出了主剪应变能强度理论,这一理论除了具有概念较为确切、清晰等优点外,还可以推论到其他强度理论及材料力学的其他内容上。

On the basis of the concept that when an elastic body, acted on by an external force, deforms, all its parts will produce elastic strain energy, the conventional formulation of the strength theory in the textbooks of strength of materials has been discussed. A new strength theory of principal shear strain energy has been presented. The theory not only has a more precise and clear concept, but also can be extended to other strength theories and contents of strength of materials.