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A Complex Potential-Variational Method for Stress Analysis of Unsymmetric Laminates With an Elliptical Cutout

机译:椭圆形不对称层压板应力分析的复势-变分方法

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摘要

A combined complex potential-variational solution method is developed for the analysis of unsymmetrically laminated plates with finite planform geometry, subjected to arbitrary edge loads, and with an inclined elliptical cutout. This method uses complex potentials and their Laurent series expansions to reduce the potential energy of a plate to a contour integral that is evaluated numerically by the trapezoidal rule. A variational statement of equilibrium is applied to the potential energy to obtain a linear system of equations in terms of the unknown coefficients of the Laurent series, whose solutions yield the stress and displacement fields for a given problem. This approach represents a computationally efficient alternative to boundary collocation procedures that are typically used to solve problems based on complex potential theory. Comparisons are made with corresponding results obtained from finite element analysis for a square unsymmetrically laminated plate with a central inclined elliptical cutout and subjected to biaxial tension. The results confirm the validity of the solution method.
机译:提出了一种复杂的势变组合求解方法,用于分析具有有限平面形状,承受任意边缘载荷和倾斜椭圆形切口的非对称层压板。该方法使用复数势及其Laurent级数展开来将板的势能减小到轮廓梯形积分,该轮廓积分由梯形法则进行数值计算。根据Laurent级数的未知系数,将平衡的变分形式应用于势能以获得线性方程组,其解可以得出给定问题的应力场和位移场。这种方法代表了边界配置过程的一种高效计算替代方案,该过程通常用于基于复杂势能理论来解决问题。将具有中心倾斜的椭圆形切口并承受双轴拉力的方形非对称层压板的有限元分析获得的相应结果进行比较。结果证实了该方法的有效性。

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