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2. Low-speed impact damage analysis of aviation composite material structure

Author

He Jun, Cao Meng, Wang Zhishu, and Cong Fanglin

Subjects
composite laminates, low-speed damage, abaqus, Environmental sciences, GE1-350
Abstract

Although the carbon fiber reinforced composite material has high specific strength and stiffness, design-versatility, anti-corrosion and other excellent features, but the impact resistance of composite structures is poor. Therefore, the composite laminates low-speed damage analysis has important significance. Based on a three-dimensional analysis theory of cumulative damage, using the commercial finite element analysis software ABAQUS to establish laminates subjected to low velocity impact finite element model. according to the numerical results and the consistency of the test results, shows that the used model of the article is reasonable and accurate, and the numerical simulation method is verified to be feasible. Finally, through the numerical simulation of process of laminated plates low speed impact damage, the damage characteristics and damage mechanism of the laminates at different times are analyzed, and the forming reasons and expanding rules of the main damage forms of fiber damage and matrix damage are revealed.

Published
2021
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7. Effect of graphene nanoplatelets on water absorption and impact resistance of fibre-metal laminates under varying environmental conditions

Author

Mohammad Uddin, Fanglin Cong, Meng Cao, Qingshi Meng, Gong-Dong Wang, Jun Ma, Hongqian Xue, Shuo Wang, Wang, Shuo, Cao, Meng, Wang, Gongdong, Cong, Fanglin, Meng, Qingshi, Uddin, Mohammad, and Ma, Jun

Subjects
Materials science, Absorption of water, Nanocomposite, Diffusion, graphene nanoplatelets, salt spray environment, Modulus, Epoxy, Metal, Impact resistance, hygrothermal environment, Exfoliated graphite nano-platelets, water absorption, visual_art, Ceramics and Composites, visual_art.visual_art_medium, Composite material, impact resistance, fibre metal laminate, Civil and Structural Engineering
Abstract

This work investigated the effect of graphene nanoplatelets (GNPs) on the water absorption and impact resistance of fibre-reinforced metal laminates (FMLs) under hygrothermal and salt spray environments. Containing GNPs of 0.1, 0.3, 0.5 and 1.0 wt%, the resulting nanocomposite FMLs were investigated for 28 days of aging in the environments. The salt-spray environment was found to pose a more serious effect on FMLs than the hygrothermal environment. The addition of GNPs at 0.3 wt% effectively reduced the water absorption of FMLs by 57.6% whilst improving their impact resistance by 150.6% in comparison with pure FML in the case of treatment by the salt-spray environment. The water absorption reduction is caused by GNPs creating a tortuous path for diffusion of water molecules and restricting the intermolecular motion of the epoxy molecules. The impact resistance improvement can be attributed to GNPs improving the modulus and crack-resistance of the epoxy matrix and thus the interfacial bonding of FMLs. Refereed/Peer-reviewed

Published
2022

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