基于精化高阶理论的层合板热-力问题有限元分析

基于精化高阶理论,建立了层合板有限元模型,编制了相应的MATLAB程序.分析了三层四边简支层合板在力荷载作用下的响应,与解析解吻合良好.分析了热-力共同作用下层合板的响应,与基于ABAQUS软件建立的精细有限元模型计算结果相对比,验证了模型的高效性.研究了跨厚比和铺设方式对层合板层间应力的影响,结果表明:跨厚比对层间应...

Finite Element Analysis of Composite Laminated Plate Subjected to Mechanical-Thermal Loadings Using Refined High-Order Theory

Based on refined high-order theory, a finite element model of laminated plate was established, and the related program was developed with MATLAB. Analyses of a laminated plate with three layers under the mechanical loads were conducted with the developed model. The numerical results agree well with the analytical ones. Responses of a laminated plate under the simultaneous thermal and mechanical loadings were simulated using the proposed model and the results were compared with those from the fine finite element simulations based on ABAQUS to verify the efficiency of the proposed model. Effects of the cross-thickness ratio and the types of laying-ups of the laminated plates on the inter-laminar stresses were analyzed. The results show that the cross-thickness ratio of the laminates has an important influence on the inter-laminar stress, and their relationship satisfies an approximately inverse proportional function. The type of symmetrical laying-ups can significantly reduce the stress between layers of laminated plate.