关于应力分类问题的一些认识

Some Viewpoints on Stress Classification

围绕杭州和上海两次研讨会的内容,就应力分析设计和塑性设计、峰值应力的自限性、有限元计算应力的等效线性化处理等问题谈谈看法。文中认为:从应力的性质和影响范围来看,峰值应力的基本特征是具有自限性和局部性,这和ASME规范从变形角度提出的“不引起任何显著的变形”的特性是一致的;等效线性化处理方法的重要性在于它是区分峰值应力的有效方法,对如何正确选择校核线的位置和方向提出了一种一般性的建议。

Based on the problems discussed in Hangzhou and Shanghai, some viewpoints on stress analysis design, plasticity design, the self- limiting property of peak stress and linear treatment of the finite element analysis result were presented in this paper. With the stress properties and its acting scope, it can be concluded that the fundamental properties of peak stress are self- limiting and localizing, which are in conform to what indicated in ASME code ＂it does not cause any noticeable distortion＂, The importance of linear treatment method lies in that it is the most effective method to categorize peak stress, A general method to determinate the location and direction of the checking line was also proposed.