文章题目：Tailoring of AP-PLY composite laminates for improved performance in the presence of delaminations
摘要：A fibre placement architecture, Advanced Placed Ply (AP-PLY), has been shown to give significantly improved damage tolerance characteristics of composite structures. The behavior of delaminations resulting from low speed impact dam- age is of particular concern. Emphasis is placed on using developed methodology to expand current knowledge on the delamination response and optimization of simple AP-PLY composite structure. A proposed energy method to analyze the strain energy release rate (SERR) of an existing crack in a composite laminate, was applied to an AP-PLY beam structure. A step by step approach was devel- oped to obtain the SERR of a crack that grows in regions of variable stiffness. The analytical SERR determined when two materials are used in sequence, sets the stage for optimization of AP-PLY composite laminates to tailor stiffness and minimize SERR. The results show promise in providing designs where the stiffness is altered so that delamination growth is delayed.
关键词：AP-PLY composite laminate, Delamination, Energy release rate, Optimization