Dynamic compressive response of wrapped carbon fibre composite corrugated cores

Liu, Tao; Turner, Paul

Abstract

The experimental study on the compressive response of the carbon fibre composite sandwich structures with corrugated cores is reported. The corrugated core was manufactured from unidirectional carbon fibre pre-impregnated lamina wrapped around destructible triangular prisms. Individual wrapped triangular composite cores of relative density are cut from the sandwich beams and tested under both quasi-static compression and dynamic compression at a strain rate up to 8200s-1 using an instrumented direct impact Kolsky bar experiment. Under quasi-static compressive test, as the cores were provided with no lateral confinement, the failure mechanism of the composite core was that of progressive unwrapping of cores due to matrix cracking at the joints of the core webs. Under the dynamic compressive tests, the composite cores demonstrated rate-dependent behaviour. The strain rate dependency was attributed to the suppression of the quasi-static “unwrapping” failure mechanism, and inertial stabilisation of the struts against buckling leading to an upper-bound failure mechanism of crushing of carbon fibre material within the struts.

Citation

Liu, T., & Turner, P. (2017). Dynamic compressive response of wrapped carbon fibre composite corrugated cores. Composite Structures, 165, 266-272. https://doi.org/10.1016/j.compstruct.2016.10.080

• Journal Article Type: Article
• Acceptance Date: Oct 19, 2016
• Online Publication Date: Oct 20, 2016
• Publication Date: Apr 1, 2017
• Deposit Date: Nov 17, 2016
• Publicly Available Date: Nov 17, 2016
• Journal: Composite Structures
• Print ISSN: 0263-8223
• Electronic ISSN: 1879-1085
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 165
• Pages: 266-272
• DOI: https://doi.org/10.1016/j.compstruct.2016.10.080
• Keywords: Composite sandwich structures; High strain rate; Strain rate sensitivity; Dynamic compression
• Public URL: https://nottingham-repository.worktribe.com/output/853874
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0263822316306456
• Additional Information: This article is maintained by: Elsevier; Article Title: Dynamic compressive response of wrapped carbon fibre composite corrugated cores; Journal Title: Composite Structures; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.compstruct.2016.10.080; Content Type: article; Copyright: © 2016 The Authors. Published by Elsevier Ltd.
• Contract Date: Nov 17, 2016