【摘要】 本文对古典第一、二强度理论的适用条件进行了分析,对于如何正确地使用该二个强度理论,和该二个强度理论存在的问题,也都进行了解释和说明。更多还原

【Abstract】 In the paper the suitable factors of the first and second classical sthrength theories are analysed. And that how to correctly apply the theories is explained as well as the problems with the theories.更多还原