The nonlinear buckling and postbuckling of eccentrically oblique-stiffened doubly curved shallow functionally graded shells is investigated based on improved Donnell equations. The improved Lekhnitskii smeared stiffeners technique is employed to found the stiffness matrix of the stiffened shells. The shells are reinforced by eccentrically oblique stiffeners with an arbitrary inclination angle. Using the Galerkin method, an analytical approximate solution for the deflection of reinforced FGM doubly curved shallow shells is obtained. The influence of geometrical parameters, oblique stiffeners, and temperature on the postbuckling behavior of the shells is analyzed.

中文翻译：

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基于改进Donnell方程的偏心斜加劲功能梯度双曲面浅壳非线性后屈曲

基于改进的Donnell方程研究了偏心斜加劲双弯曲浅功能梯度壳的非线性屈曲和后屈曲。采用改进的 Lekhnitskii 涂抹加劲肋技术来建立加劲壳的刚度矩阵。壳体由具有任意倾角的偏心斜加强筋加强。使用Galerkin方法，获得了增强FGM双弯曲浅壳挠度的解析近似解。分析了几何参数、斜加强筋和温度对壳的后屈曲行为的影响。