本文利用von Karman非线性薄板理论,求解了复合材料中有横向纤维搭桥作用的圆形薄膜脱层的后屈曲问题,获得了桥联脱层均匀扩展的能量释放率和断裂韧性.通过大量的计算和分析得到一个重要结论:搭桥纤维的存在不仅对脱层的初始扩展起到了增韧作用,而且避免了脱层扩展的灾难性.同时定量地给出了搭桥作用对脱层初始扩展的增韧程度,并且确定了桥联脱层扩展稳定与不稳定的分区,对不稳定脱层还给出了失稳扩展的范围及动态效应的估计.
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