【作者】 叶夏妮； 刘福江； 陆明万；

【Author】 YE Xia-ni~1 LIU Fu-jiang~1 LU Ming-wan~2 (1.College of Petroleum Engineer,China University of Petroleum,Beijing 102249; 2.Department of Engineering Mechanics,Tsinghua University,Beijing 100084)

【机构】 中国石油大学石油工程学院； 清华大学工程力学系；

【摘要】 本文针对有限元计算应力等效线性化处理时遇到的若干问题进行研究,包括应力分类线和坐标系的选择、横剪应力的线性化、薄膜加弯曲应力强度大于总应力强度的原因、厚度方向正应力和中面剪应力的处理等。通过对典型算例中出现的一些具有普遍意义的现象进行分析,提出一种应力等效线性化处理的改进方法。更多还原

【Abstract】 Some problems on equivalent linearization of stresses calculated by FEA are studied in this paper, including the selection of the stress classification line and coordinate system,the linearization of transverse shear forces,the reason why membrane plus bending stress intensity is larger than total stress intensity,the treatment of the normal stress along thickness and the shear stress in the mid-surface etc.Through analyzing some general phenomenon arising in several typical examples,we proposed a modified method for equivalent linearization of stresses.更多还原