Perforation of aluminium alloy-CFRP bilayer plates under quasi-static and impact loading
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Authors
Yu, B
Deshpande, VS
Fleck, NA
Publication Date
2018-11-01Journal Title
International Journal of Impact Engineering
ISSN
0734-743X
Publisher
Elsevier BV
Volume
121
Pages
106-118
Type
Article
Metadata
Show full item recordCitation
Yu, B., Deshpande, V., & Fleck, N. (2018). Perforation of aluminium alloy-CFRP bilayer plates under quasi-static and impact loading. International Journal of Impact Engineering, 121 106-118. https://doi.org/10.1016/j.ijimpeng.2018.06.011
Abstract
The ability of a metallic surface layer to protect CFRP cross-ply plates against perforation is explored. Aluminium alloy plates (either AA1050A or AA6082-T6) were placed in front of a CFRP layer, and the bilayer was subjected to either quasi-static indentation or to ballistic impact by a spherical projectile, with rigid back support or an edge-clamped boundary condition. The observed perforation mechanism of the CFRP layer is neither influenced by the presence of the metallic layer nor by the choice of loading rate (i.e. quasi-static versus ballistic). In the back-supported condition, the CFRP layers fail by an indirect tension mode that consists of tensile failure of plies in the material directly beneath the indenter or projectile. Alternatively, in the edge-clamped condition, the CFRP layers fail by a shear plugging mechanism. Although the presence of metallic layers does not suppress the shear plugging of the underlying CFRP layer, the loaded area in the CFRP layer increases by the addition of the protective metallic layer, thereby increasing the perforation resistance of the CFRP layer.
Sponsorship
he research work was sponsored by the Office of Naval Research (ONR), U.S. (Prime Award No. N62909-14-1-N232). The raw composite materials and the autoclave manufacturing process were generously provided by Hexcel Ltd. Finally, the doctoral study of one of the authors (B. Yu) was sponsored by the Croucher Foundation and the Cambridge Commonwealth, European & International Trust.
Identifiers
External DOI: https://doi.org/10.1016/j.ijimpeng.2018.06.011
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285128
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