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项目负责人:沈惠申所在单位:上海交通大学项目批准号:59975058项目简介本课题主要涉及结构非线性稳定理论及其应用。以研究复合材料层合剪切板壳结构在复杂环境和复杂荷载作用下的屈曲强度和后屈曲承载能力为主要目标。复合材料层合板壳结构通常承受机械荷载和热荷载的共同作用,而预加热荷载或机械荷载往往会降低板壳结构的屈曲荷载（或临界温度）和后屈曲/热后屈曲承载能力。复合材料的力学性能对于外部环境有着很大的依赖性。外部环境的两种效应可以造成很大的内应变,从而影响屈曲荷载。这两种效应是吸湿效应和热效应。水
Project Leader: Shen Huishen Unit: Shanghai Jiaotong University Project Approval No .: 59975058 Project Description This subject mainly involves the structural nonlinear stability theory and its application. The main objective of this study is to study the buckling strength and post-buckling bearing capacity of composite laminated shear-sheet shell under complex environment and complicated loading. The composite laminate shell structure usually withstands both mechanical and thermal loads, while preheating or mechanical loading tends to reduce buckling (or critical temperature) and post-buckling / thermal post-buckling loading of the shell structure. The mechanical properties of composites have a great dependence on the external environment. Two effects of the external environment can cause a large internal strain, thus affecting the buckling load. These two effects are hygroscopic and thermal effects. water