【摘要】 考察了LY1 2爆炸复合板不同取向的拉伸强度、分层韧性及疲劳裂纹扩展行为。观测了疲劳长裂纹的扩展路径形态 ,并利用断裂力学理论讨论了材料的层状结构与其疲劳性能之间的关系。结果表明 ,层合板中的层间界面性能对其疲劳性能具有重要影响 ,在LY1 2爆炸复合板中 ,垂直板面L S取向和L T取向的疲劳裂纹在扩展过程中都发生了明显的止裂更多还原

【Abstract】 An explosive bonded LY12 laminate plate was applied to investigate the effect of interface bonding strength on fatigue crack propagation path. The fatigue crack growth behavior was investigated under four point bending conditions. The energy release rates of crack propagation at the interface and in the matrix were examined with double cantilever beam (DCB) specimens. The results indicate that, the interface of laminated composites plays a significant role in fatigue crack growth. The fatigue crack propagation is arrested by the interface delamination in the explosive bonded LY12 laminate.更多还原