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publication name Impact and Post-Impact Response of Lightweight CFRP/Wood Sandwich Composites
Authors 2. Basha, M., Wagih, A., Melaibari, A., Lubineau, G., Abdraboh, A. M., & Eltaher, M. A.
year 2022
keywords
journal Composite Structures
volume 279
issue Not Available
pages 114766
publisher Elsevier
Local/International International
Paper Link https://doi.org/10.1016/j.compstruct.2021.114766
Full paper download
Supplementary materials Not Available
Abstract

Lightweight CFRP/wood sandwich composites receive considerable attention because they can be tailored to satisfy many specifcations. Therefore, the damage modes during low velocity impact and compression after impact (CAI) of CFRP/wood sandwich laminate with different wood core types are investigated in this article. The effect of wood fber orientation on the specifc energy dissipation and CAI strength are studied. Results demonstrated that the laminate with balsa core wood, where the wood fbers are perpendicular to the CFRP face plies, shows higher impact load and dissipated energy due to the ability of wood cells to deform during impact and hence dissipate more energy. However, the laminate with birch core, where the wood fbers are parallel to the CFRP surface plies, reveals slightly larger CAI strength due to the role of wood fbers in sharing the load during compression. The damage initiated in the balsa core sandwich laminates at the impacted face and propagate to the unimpacted CFRP surface, while the opposite damage behavior occurs for the birch core sandwich laminate. The balsa core laminate showed larger specifc impact load (load/density), dissipated energy (dissipated energy/density), and CAI strength (strength/density), reaching 2.21-, 2.24-, and 1.41-fold times compared to birch core laminates.

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