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通过对缝合复合材料层板进行低速冲击和冲击后压缩实验,研究了不同类型的缝合复合材料层板的冲击损伤特性及冲击后压缩的剩余强度。实验研究表明:基体损伤和分层是缝合层板与未缝合层板低速冲击的主要损伤模式,缝合层板具有更好的抗冲击性能,更高的冲击后压缩强度。缝合密度越大的层板其抗冲击性能越好,冲击后压缩强度越高。缝合方向为0°的缝合层板较缝合方向为90°的缝合层板具有更好的抗冲击性能和更高的冲击后压缩强度。增加0°方向铺层,减少45°、-45°方向铺层,可以提高缝合层板的抗冲击性能和冲击后压缩强度。
The impact damage characteristics and the residual strength after impact compression of different types of stitched composite laminates were studied through the low-speed impact and post-impact compression tests on the stitched composite laminates. Experimental studies show that the matrix damage and delamination are the main damage modes of low velocity impact between stitched laminates and non-stitched laminates. Stitched laminates have better impact resistance and higher compressive strength after impact. The greater the density of the stitched plywood, the better its impact resistance and the higher the compressive strength after impact. Stitched laminates with suture orientation of 0 ° have better impact resistance and higher post-impact compressive strength than suture laminates with suture direction of 90 °. Increasing the ply direction at 0 ° and reducing the ply direction at 45 ° and -45 ° can improve the impact resistance and post-impact compressive strength of the suture laminate.