局部受损预载结构屈曲强度和后屈曲承载能力评估和预报

A postbuckling analysis is presented for imperfect shear deformation laminated shells and panels subjected to combined mechanical and thermal loads. A boundary layer theory for the shell buckling is developed, which includes the effects of nonlinear prebuckling deformations, nonlinear large deflections in the postbuckling range and initial geometric imperfections of the shell. Based on the Kármán-type equations, the non-linear bending and vibration analyses are presented for the functionally graded plates in thermal environments by using a semi-analytical approach. The postbuckling behavior of perfect and imperfect, laminated cylindrical shells and panels with fully covered or embedded piezoelectric actuators under different sets of mechanical, thermal and electrical loading conditions is also presented. The results presented are useful for engineering design for aeronautics and astronautics industries.

在复合材料层合板壳高阶剪切变形理论的框架下，运用摄动技术（包括奇异摄动技术）和摄动一伽辽金混合法，解决由于碰撞或冲击造成具有局部窝形损伤复合材料中厚圆柱壳及块壳结构在预加机械荷载或热荷载作用下的屈曲强度和后屈曲承载能力的评估和预报，为工程设计提供可靠的理论依据，并为解决此类复杂的非线性问题提供有效的分析方法和计算程序。