对湿热环境下考虑累积失效和分层损伤的先进复合材料格栅加筋结构(AGS)的稳定性进行了数值分析.基于一阶剪切理论和Von Karman非线性变形假设建立了含分层损伤复合材料AGS结构的有限元模型,并推导了考虑温度和湿度效应的AGS结构有限元列式,同时给出了材料破坏准则.通过典型算例讨论了湿热环境、累积失效及分层损伤等因素对复合材料AGS结构稳定性的影响,数值结果表明当上述因素导致结构的屈曲模式发生突变时,其对AGS结构稳定性能的影响是不容忽视的.
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