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中文摘要：
将面板单层及芯层厚度、面板纤维方向角和材料参数作为随机变量,通过编制基于高阶剪切理论的随机有限元程序,对复合材料夹层板的屈曲强度分散性进行了分析,得到了不同铺层方式下夹层板屈曲强度分散系数随纤维方向角及夹层板长厚比的变化规律。并通过对屈曲强度的分散系数进行灵敏度分析,确定了影响分散系数大小的主要因素,从而为材料设计、制造工艺改进和夹层板结构可靠度的提高提供了理论依据。
英文摘要：
Considering the layer thicknesses,fiber angles and materials properties as random variables,the variation of buckling strengths for composite sandwich plates was analyzed.With the stochastic finite element method（SFEM） based on high-order shear deformation theory（HSDT）,the influences of fiber angles and side-to-thickness ratios on the coefficient of variance（COV） of buckling strengths for composite sandwich plates with different stacking sequences were studied.The sensitivity degrees of COV indicate the main effect factors for buckling strengths variances of sandwich plates,and the results are meaningful for material manufacture processes improvement for increasing the buckling reliability of composite sandwich plates.
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