ABSTRACT

This paper presents the optimization of stacking sequence of composite laminate adherends in an adhesive single lap joint under bending moment in order to minimize the amount of maximum peel and shear stress of the adhesive layer. The effects of different assumptions on the equations of the stress and their results are presented. The adhesive single lap joint is modelled as an adherend-adhesive sandwich panel. The finite element method is used to verify the analytical method and the structure is modelled by ANSYS software version 14. The results of the analytical method and the finite element method are compared, and there was a good agreement between two methods. For the optimization part, the single-objective and multi-objective bees algorithm are used to search for the best and worst stacking sequence with and without permutation. The results of the optimization indicate that the maximum shear and peel stress highly depend on the extensional, coupling and bending stiffness in a way that in the optimum model, adherends have high and almost equal stiffness. In the worst models, there is a huge difference in the stiffness of the adherends causing destructive high stress in the thinner adherend.

摘要

本文提出了在弯曲力矩下粘合单搭接接头中复合层压板被粘体的堆叠顺序的优化，以最大限度地减少粘合剂层的最大剥离和剪切应力。介绍了不同假设对应力方程的影响及其结果。胶粘单搭接接头被建模为胶粘夹芯板。采用有限元法对解析法进行了验证，并用ANSYS 14软件对结构进行了建模。将解析法和有限元法的结果进行了比较，两种方法有很好的一致性。对于优化部分，使用单目标和多目标蜜蜂算法来搜索有和没有排列的最佳和最差堆叠序列。优化结果表明，最大剪应力和剥离应力高度依赖于拉伸刚度、耦合刚度和弯曲刚度，在最佳模型中，被粘物具有高且几乎相等的刚度。在最坏的模型中，被粘物的刚度存在巨大差异，导致较薄的被粘物产生破坏性的高应力。