弹性支承上四边简支复合材料层合板屈曲性能分析

采用双参数地基模型,运用能量变分法,推导了弹性支承上四边简支复合材料层合板在面内压缩荷载作用下屈曲问题理论计算公式;并将结果与现有结果进行对比,验证了方法的适用性。对纤维铺层、弹性支承常数及纵横比等参数对复合材料层合板屈曲系数影响进行分析。结果表明,层合板屈曲系数随着弹性支承刚度的增加而增大,随着纤维铺层角的变化而变化,弹性支承剪切刚度对层合板屈曲系数的贡献不可忽略。方法可为复合材料夹层板结构实际工程设计提供参考。

BUCKLING PERFORMANCE OF COMPOSITE LAMINATED PLATES ON PASTERNAK FOUNDATIONS

This paper investigates the buckling performance of thin, simply supported laminates with in-plane loads on Pasternak foundations, using energy variation method. The applicability of the theoretic solution is verified by the results of references. Then, the influence of laminate parameters (fiber orientation, number of fiber layers and geometric dimensions) and foundation parameters on buckling coefficient of the laminate plates are performed. The results indicate that the buckling coefficient of the laminated plates increase with the stiffness of the elastic support. And the number of fiber layer and the fiber orientation have great influcence on the buckling coefficient. In addition, the effect of the shear stiffness of the elastic support on buckling coefficient cannot be ignored. The method propsoed in this paper can provide reference for design of composite sandwich structures.