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对经穿透挖补修理后的平面编织混杂铺层层板的拉伸性能进行了试验研究,结果表明初始损伤相同时,挖补斜度为1∶30的试件的拉伸强度最高,可以达到完好板强度的97.8%,并且不同挖补斜度的试件表现出不同的破坏模式。此外挖补斜度相同时增大初始损伤会导致拉伸强度降低。在试验基础上建立渐进损伤有限元模型,并对修理试件的拉伸强度及破坏过程进行研究,数值模型得到的极限强度和破坏模式与试验结果吻合良好。
Tensile properties of the plain-woven hybrid laminate after piercing and repairing are tested. The results show that when the initial damage is the same, the tensile strength of the specimen with the dilatancy of 1:30 is the highest, which can reach the intact The plate strength of 97.8%, and different slope of the specimen showed different failure modes. In addition, when the same digging slope increases the initial damage will lead to lower tensile strength. Based on the experiment, a finite element model of progressive damage was established, and the tensile strength and failure process of the repaired specimen were studied. The ultimate strength and failure mode obtained by the numerical model were in good agreement with the experimental results.