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Fabrication and mechanical characterization of CFRP X-core sandwich panels

Mei, J; Tan, PJ; Bosi, F; Zhang, T; Liu, JY; Wang, B; Huang, W; (2021) Fabrication and mechanical characterization of CFRP X-core sandwich panels. Thin-Walled Structures , 158 , Article 107144. 10.1016/j.tws.2020.107144. (In press).

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Abstract

A hot-press molding technique is developed to design and manufacture carbon fiber reinforced polymer (CFRP) X-core sandwich panels that allowed both the composite face sheets and its X-core to be simultaneously molded together. Compression tests were performed on the sandwich panels to assess the effects of relative density on its compressive properties and the failure mode that it develops. Analytical models were developed to predict the panel stiffness and strength; and a failure map of its deformation mode is generated based on the geometric parameters of the unit cell. Linear and nonlinear finite element analyses were performed to further investigate the effects of initial geometric imperfection and progressive damage on the response of the sandwich panels with different cell wall slenderness. Predictions from analytical and numerical models will be shown to be in good agreement with the experiments. The CFRP X-core sandwich panels will be shown to attain good compressive properties that are comparable to typical high strength cellular materials, which will be potentially useful for lightweighting applications.

Type: Article
Title: Fabrication and mechanical characterization of CFRP X-core sandwich panels
DOI: 10.1016/j.tws.2020.107144
Publisher version: https://doi.org/10.1016/j.tws.2020.107144
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Carbon fiber, Mechanical properties, Analytical modelling, Mechanical testing, Failure mechanism map, Finite element analysis
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10113481
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