【摘要】 本文按照某种石墨颗粒增强复合材料的加卸载的应力应变试验曲线提出了一种 相应于这种材料的卸载模型和加、卸载判别准则。此模型、准则和Ｊｏｎｅｓ－ Ｎｅｌｓｏｎ－Ｍｏｒｇａｎ［１］的非线性复合材料模型相结合可以解决在加、卸载下复合材 料的结构分析问题．文后列出了两种工况下石墨颗粒增强复合材料板的应力分析计 算结果．更多还原

【Abstract】 This paper extends a new unloading model and loading--unloading criterion of the nonlinear multimodulus composite materials, according to the stress--strain ex- perimental curves.The mathematical model and the criterion incorporated with Jon- es-Morgan-Nelson nonlinear deformation model are used to analyze the stress in the structure made of nonlinear multimodulus materials under loading and unloading cases. The computing results for the nonlinear deformation of the artificial graph- ite materials plates are given for illustration.更多还原