Mode I and Mode II interlaminar fracture toughness of CFRP/magnesium alloys hybrid laminates |
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| Authors: | Yingcai Pan Xu Cheng Zongke Zhang Maoyuan Li Sudong Ji |
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| Institution: | 1. School of Materials Science and Engineering, Beihang University, Beijing, China;2. The System Design Institute of Mechanical-Electrical Engineering Beijing, Beijing, China |
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| Abstract: | The fiber metal laminates (FML), consisting of carbon fiber reinforced polymer prepregs and magnesium alloys sheets, were introduced, and the Mode I (peel) and Mode II (shear) interlaminar fracture toughness of the FMLs were investigated. The results show that the Mode I interlaminar toughness (0.23 kJ/m2) of the FMLs is much lower than the Mode II interlaminar toughness (5.81 kJ/m2), due to the fact that the effects of mechanical interlock to hinder crack propagates is smaller under Mode I loading conditions than under Mode II. The FMLs mainly show adhesive failure and interfacial failure under Mode I loading conditions, while for Mode II loading, it exhibits a degree of epoxy cohesive failure except the adhesive failure and interfacial failure. |
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| Keywords: | Fiber metal laminates fracture toughness fractography Mode I Mode II |
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