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Experimental investigation on mean crushing stress characterization of carbon–epoxy plies under compressive crushing mode

Israr, Haris Ahmad and Rivallant, Samuel and Barrau, Jean-Jacques Experimental investigation on mean crushing stress characterization of carbon–epoxy plies under compressive crushing mode. (2013) Composite Structures, vol. 96 . pp. 357-364. ISSN 0263-8223

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Official URL: http://dx.doi.org/10.1016/j.compstruct.2012.09.022

Abstract

A challenge in numerical simulation of crashworthiness study is to be able to predict the crush damage modes, their evolution during crushing and the energy absorption in any composite structure from elementary material characterisation data. Therefore, it is important to know the behavior of one ply subjected to crushing load, and especially to determine the mean crushing stress that could be used for simulation. For that purpose, quasi-static crushing tests are performed for different configurations of two CFRP materials, UD and fabrics to determine the mean crushing stress of plies alone and inside a laminate. This study shows there is a linear relationship between crushing load and the contact surface of the plies being crushed on a metallic base which enables actually to define a mean crushing stress for a ply. The method to calculate this value is presented in this paper, based on image analysis of specific crushing tests. Experimental results show that for the UD material, the mean crushing stresses in 0° and 90° plies are very close. The value for a balanced fabric is also similar, approximately 270 MPa.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Composites Structures website: http://www.sciencedirect.com/science/journal/02638223/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Ecole des Mines d'Albi-Carmaux - EMAC
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Universiti Teknologi Malaysia - UTM (MALAYSIA)
Laboratory name:
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Deposited By: Samuel RIVALLANT

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