Abstract In this paper, the buckling of cross-ply and angle-ply composite beams under hygro-thermo-mechanical loading is presented by the analytical approach. This approach is based on theory of hyperbolic refined shear deformation. This approach which has strong resemblance with beam theory of Euler Bernoulli in various aspects, accounts for a second-degree variation of the transverse shear strains through the thickness and verified the zero traction of boundary conditions on the bottom and top beam surfaces sans employing shear correction factors. The effects of temperature and moisture concentration, thus the effect of the ratios of modulus, length to thickness and coefficient of thermal expansion respectively on hygro-thermo-mechanical buckling of cross-ply and angle-ply laminated beams are studied.

中文翻译：

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基于双曲线精细剪切变形理论的层合梁湿热机械屈曲

摘要 在本文中，交叉层和角层复合梁在湿热机械载荷下的屈曲是通过解析方法提出的。该方法基于双曲线精细剪切变形理论。这种方法在各个方面与 Euler Bernoulli 的梁理论非常相似，解释了横向剪切应变随厚度的二次变化，并验证了底部和顶部梁表面上的边界条件的零牵引力，无需使用剪切校正因素。研究了温度和水分浓度的影响，进而研究了模量比、长厚比和热膨胀系数分别对交叉层和角层层合梁湿热机械屈曲的影响。