Tensile behavior of hybrid laminates repaired by full depth scarfing
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摘要: 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。Abstract: Experimental study on tensile behavior of hybrid plain woven fabric laminate repaired by scarfing method was conducted. The results show under the same initial damage dimension, the specimen with scarf ratio of 1∶30 has the highest tensile strength which can reach 97.8% of the intact laminate strength and the failure mode changes upon the scarf ratio. Besides, when the scarf ratio is fixed, extending the dimension of initial damage can decrease the tensile strength of specimen. Based on test results, a finite element model is adopted to research tensile strength and progressive damage process of repaired specimen. The calculated strength and failure mode are in good agreement with test results.
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Key words:
- scarfing repair /
- plain woven /
- hybrid laminate /
- progressive damage /
- tensile strength
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