论不用平面假设推导材料力学应力公式

Not Used the Plane Hypothesis in Mechanics Material to Make the Deduction of the tSress Formula

传统材料力学教材里,使用平面假设推导应力公式时,采取由表及里的方法去推测截面内部应力分布规律,显得繁琐,实属滞留在材料力学教材中已被科技发展逾越了的陈旧内容。本文认为可直接应用光测法的结论,把应力分布规律视作已知,直接应用于应力公式的推导中,从而可使应力公式的推导简明扼要,更符合理论与实验相结合的要求。

This article suggests that in view of up—to—date development of science and technolocgy it would seem very complicated to follow the cmethod of using the plane hypothesis which follows the method of process from the outside to the inside to conjecture the stress law of inner section in deducing the stress formula in traditional teaching material of Material Mechanics The Gontents remaining in teaehing material must be rejected because they are obsolete and exceeded by the development of science and technology, The conclusion of the photoelastic metnod to regard the figure of the stress distribution law as known may be directly used to make the deduction of the stress formula briefand to the point and accords with the requirement of combining theory and practice.