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混杂铺层层板穿透挖补修理后拉伸性能

, PP. 223-229

Keywords: 挖补修理,平面织物,混杂铺层,渐进损伤,拉伸强度

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Abstract:

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。

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