The fatigue-induced fracture failure of the aircraft canopy occurred in the poly(methyl methacrylate) (PMMA) layer laminated on polycarbonate (PC) during flight. For more than 24 years, the aircraft had been operated at high altitudes and supersonic flight. To identify the root cause and the mechanism for the formation of the fracture, the fracture surfaces were investigated. The fracture morphologies were characterized using optical microscope (OM) and scanning electron microscope (SEM).

中文翻译：

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丙烯酸-聚碳酸酯层压飞机座舱管疲劳引起的断裂破坏


飞机座舱管疲劳诱导的断裂破坏发生在飞行过程中层压在聚碳酸酯 （PC） 上的聚甲基丙烯酸甲酯 （PMMA） 层中。24 年来，该飞机一直在高空和超音速飞行。为了确定断裂形成的根本原因和机制，对断裂表面进行了调查。使用光学显微镜 （OM） 和扫描电子显微镜 （SEM） 对裂缝形态进行表征。