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对复合材料开口缝合补强结构进行了实验研究。测试了不同缝合参数(针距、行距、边距、单重和双重缝合)补强的含孔复合材料层板的拉伸强度,研究了孔边应力集中、应变集中对强度、刚度等力学性能参数的影响,分析讨论了孔边及邻近区域应变集中及应变分布的规律,得到不同缝合参数、孔边不同位置以及不同载荷条件下的应变集中系数。结合实验结果和分析讨论,给出了含孔复合材料层板缝合补强的缝合设计参数。
The composite suture reinforcement structure was tested. Tensile strength of the composite plate with holes reinforced with different stitching parameters (stitch length, row spacing, margin, single and double stitching) was tested. Stress concentration at the edge of the hole, strain concentration on the mechanical properties such as strength and stiffness The influence of parameters on the strain concentration and distribution of strain near the hole edge and its adjacent area was analyzed and discussed. The strain concentration coefficients at different positions of the hole and under different loading conditions were obtained. Combined with the experimental results and the analysis and discussion, the suture design parameters of the suture reinforcement with porous composite laminates are given.