针对冲击后复合材料层合板,发展了含冲击初始损伤层合板的压-压疲劳寿命预测方法.该方法基于无损单向板的力学性能和疲劳特性,对不同铺层参数、不同几何尺寸以及不同冲击条件下层合板的疲劳寿命进行预测.为消除人为假设冲击损伤造成的误差,对层合板在冲击载荷及冲击后疲劳载荷作用下的破坏进行全程分析,即把冲击后层合板的实际损伤状态直接作为疲劳分析的初始状态.同时基于逐渐损伤思想,推导了含冲击初始损伤层合板的应力分析过程,建立了相应的三维逐渐累积损伤模型,开发了参数化的复合材料层合结构冲击及冲击后疲劳破坏模拟程序,为复合材料层合结构的抗冲击设计及其疲劳损伤扩展行为研究提供了较好的技术平台.
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