复合材料层合板开口补强技术试验研究

国内外学者对复合材料开口非对称补强做了很多研究,但主要集中在小开口的插层补强及共固化补强上。对用机械连接补强技术和插层补强技术补强后的层合板,进行拉伸和剪切试验;并采用有限元方法对补强后的复合材料层合板进行数值仿真,仿真结果与试验结果吻合得较好。经试验研究和数值仿真,得到各补强方案在各工况下的最大应变位置,并将不同补强方案进行对比。结果表明:插层补强方案优于机械补强方案。

Experimental Study on Reinforcement Technology of Composite Laminates with a Hole

The composite laminates have been widely used in aerospace structures. The problem of reinforcement of laminates with holes has also got a lot of attention. In this paper, the reinforcement technology of composite laminates with large holes is studied. Tensile and shear experiments have been finished on the laminates reinforced by bolt connection technology and intercalation technology. The mechanical properties of reinforced laminates are compared with the laminate without hole, and some useful results have been got. Finite element models of reinforced laminates have been set. The simulation results fit well with the experiment results. The position of maximum strain has been got from the simulation results and different reinforcement schemes are compared. The best one is the laminate reinforced by intercalation technology, which have the basic sequence of layers and a circular hole in the middle.