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Dynamic compressive response of wrapped carbon fibre composite corrugated cores

Liu, Tao; Turner, Paul

Authors

Tao Liu tao.liu@nottingham.ac.uk

Paul Turner evxpt1@nottingham.ac.uk



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.

Journal Article Type Article
Publication Date Apr 1, 2017
Journal Composite Structures
Print ISSN 0263-8223
Electronic ISSN 1879-1085
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 165
APA6 Citation Liu, T., & Turner, P. (2017). Dynamic compressive response of wrapped carbon fibre composite corrugated cores. Composite Structures, 165, https://doi.org/10.1016/j.compstruct.2016.10.080
DOI https://doi.org/10.1016/j.compstruct.2016.10.080
Keywords Composite sandwich structures; High strain rate; Strain rate sensitivity; Dynamic compression
Publisher URL http://www.sciencedirect.com/science/article/pii/S0263822316306456
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0



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