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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Thermomechanical postbuckling of imperfect shear deformable laminated plates on elastic foundations
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Thermomechanical postbuckling of imperfect shear deformable laminated plates on elastic foundations

机译：弹性基础上不理想剪切变形层压板的热机械后屈曲

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摘要

Postbuckling analysis is presented for a simply supported, shear deformable composite laminated plate subjected to combined axial and thermal loads and resting on an elastic foundation. The two cases of thermal postbuckling of initially compressed plates and of compressive postbuckling of initially heated plates are considered. The initial geometric imperfection of the plate is taken into account. The formulations are based on Reddy's higher order shear deformation plate theory, including the plate-foundation interaction and thermal effects. The analysis uses a perturbation technique to determine the buckling loads and the postbuckling equilibrium paths. Numerical examples are presented that relate to the performances of perfect and imperfect, antisymmetric angle-ply and symmetric cross-ply laminated plates resting on Pasternak-type or softening nonlinear elastic foundations from which results for Winkler elastic foundations are obtained as a limiting case. The effects played by foundation stiffness, transverse shear deformation, plate aspect ratio, total number of plies, fiber orientation and initial geometric imperfections are studied.
机译：提出了一种简单支撑，可剪切变形的复合层合板的屈曲后分析，该复合层合板承受了轴向和热的联合载荷，并置于弹性基础上。考虑了初始压缩板的热后屈曲和初始加热板的压缩后屈曲的两种情况。考虑了板的初始几何缺陷。这些公式基于Reddy的高阶剪切变形板理论，包括板-基础相互作用和热效应。分析使用摄动技术确定屈曲载荷和屈曲后的平衡路径。给出了一些数值示例，这些示例涉及基于Pasternak型或软化非线性弹性基础的完美和不完美，反对称的角层和对称的交叉层合板的性能，从中获得了Winkler弹性基础的结果作为极限情况。研究了基础刚度，横向剪切变形，板高宽比，层数总数，纤维方向和初始几何缺陷的影响。

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