含面板内分层损伤的复合材料夹层板在承受压缩载荷时 ,很容易发生局部屈曲 ,导致分层扩展和结构失效 ,恶劣的湿热环境更是使之加剧 .利用可动边界变分问题对分层扩展进行了分析 ,导出了分层边界的逐点能量释放率表达式 ,采用Rayleigh Ritz法研究了任意的湿热环境对含损伤的复合材料夹层板分层扩展性能的影响 Composite sandwich panels with delamination in the panel are prone to local buckling when subjected to compressive loads, resulting in delamination and structural failure, which aggravates the harsh hot and humid environment. Layer expansions were analyzed and the expression of the point-by-point energy release rate of the layered boundary was deduced. The Rayleigh Ritz method was used to study the effect of arbitrary hot and humid environment on the delamination expansion performance of the composite sandwich panel with damage