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。
Both impact and compression after impact tests were carried out to research the impact damage and post-impact residual strength of stitched laminates in various types.The results indicate that the matrix damage and delamination are the main damage mode of stitched and unstitched laminates after impact.Compared with the unstitched laminates,stitching improves the damage resistance of impact and the compressive strength of after impact.The impact damage and the post-impact residual strength increase with the stitch density increasing.The stitch laminates with 0°direction have better damage resistance and higher compressive strength of after impact.Adding ply 0°while reducing the ply 45°,-45°can improve the damage resistance of impact and the compressive strength of after impact.
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