湿热载荷下含损伤夹层板分层扩展判定分析

Delamination Growth of Composite Sandwich under Hygrothermal and Mechanical Loads

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

The local buckling may occur in composite sandwich with delamination induced by impact damage. This often causes delamination growth and structure failure. The delamiantion growth is studied by using the variational method of moving boundary, and the formulas of energy release rate G along the delamination front are obtained. By employing Rayleigh Ritz method, the hygrothermal effect on buckling character of composite sandwich plates containing delamination between two faceplate laminae is studied.