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首先,针对斜接修补CFRP抗冲击性能差的问题,分别使用基于接触的内聚力模型(SCZM)和基于单元的内聚力模型(ECZM)描述层间分层和斜接胶层破坏,研究CFRP层板的冲击响应和两种失效的演化规律。然后,分析了冲击能量、斜接角度和预拉伸作用对两种失效的影响。结果表明层间分层起始时间早于胶层破坏,与冲击能量无关;分层和胶层破坏面积随冲击能量增加而增大,胶层破坏面积增加的更明显;斜接角度主要影响胶层破坏,对分层面积几乎无影响;预拉伸作用对两种失效均具有负面作用。最后,进一步讨论分层对胶层破坏的影响,通过与只考虑胶层破坏的情况进行对比,发现层间分层使胶层破坏的面积降低,延缓了胶层的最终失效。
First of all, aiming at the poor impact resistance of milled CFRP, the contact-based cohesion model (SCZM) and cell-based cohesion model (ECZM) Impulse response and evolution of two kinds of failure. Then, the impact of impact energy, miter angle and pretension on the two kinds of failure was analyzed. The results show that the delamination start time is earlier than the detonation of the sealant, and has nothing to do with the impact energy. The delamination area and delamination area increase with the impact energy and the delamination area increases more obviously. Layer damage, almost no effect on the stratification area; Pre-stretching effect has both negative effects. Finally, the effect of layering on the failure of the adhesive layer is discussed further. By comparing with the case of considering only the adhesive layer damage, it is found that the layer delamination reduces the area destroyed by the adhesive layer and delays the final failure of the adhesive layer.