采用基于复合材料一阶剪切效应理论的有限元法分别研究了含分层损伤的复合材料层合光板、单向加筋板和格栅加筋(AGS)板的热屈曲性态.在分析中考虑材料热物理性质与温度相关特性,同时在分层前缘采用了位移约束条件以保证分层区域的各子板的变形相容要求.3种结构的典型算例分析和结果的比较表明,复合材料格栅(AGS)板具有很强的抗热屈曲的能力,但是,分层损伤将使其临界温度降低,同时还会导致热屈曲的模态发生改变.本文中提出的方法和所得结论对AGS结构的热承载能力预测和损伤容限设计将具有参考价值.
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