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Folding of fiber composites with a hyperelastic matrix

Lόpez Jiménez, Francisco and Pellegrino, Sergio (2012) Folding of fiber composites with a hyperelastic matrix. International Journal of Solids and Structures, 49 (3-4). pp. 395-407. ISSN 0020-7683. doi:10.1016/j.ijsolstr.2011.09.010.

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This paper presents an experimental and numerical study of the folding behavior of thin composite materials consisting of carbon fibers embedded in a silicone matrix. The soft matrix allows the fibers to microbuckle without breaking and this acts as a stress relief mechanism during folding, which allows the material to reach very high curvatures. The experiments show a highly non-linear moment vs. curvature relationship, as well as strain softening under cyclic loading. A finite element model has been created to study the micromechanics of the problem. The fibers are modeled as linear-elastic solid elements distributed in a hyperelastic matrix according to a random arrangement based on experimental observations. The simulations obtained from this model capture the detailed micromechanics of the problem and the experimentally observed non-linear response. The proposed model is in good quantitative agreement with the experimental results for the case of lower fiber volume fractions but in the case of higher volume fractions the predicted response is overly stiff.

Item Type:Article
Related URLs:
URLURL TypeDescription
Pellegrino, Sergio0000-0001-9373-3278
Additional Information:© 2011 Elsevier Ltd. Received 26 March 2011. Revised 9 September 2011. Available online 28 September 2011. Two anonymous reviewers are thanked for comments on the presentation of this paper. This study was supported with funding from the Keck Institute of Space Studies (KISS) at Caltech and an Earl K. Seals fellowship. The Itochu Corporation of Japan has kindly provided materials for this research.
Group:GALCIT, Keck Institute for Space Studies
Funding AgencyGrant Number
Keck Institute for Space Studies (KISS)UNSPECIFIED
Earl K. Seals fellowshipUNSPECIFIED
Subject Keywords:Fiber composites; Hyperelastic matrix; Bending; Microbuckling; Strain softening; Random microstructure
Issue or Number:3-4
Record Number:CaltechAUTHORS:20120321-093716989
Persistent URL:
Official Citation:Francisco López Jiménez, Sergio Pellegrino, Folding of fiber composites with a hyperelastic matrix, International Journal of Solids and Structures, Volume 49, Issues 3–4, February 2012, Pages 395-407, ISSN 0020-7683, 10.1016/j.ijsolstr.2011.09.010. (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29794
Deposited By: Ruth Sustaita
Deposited On:21 Mar 2012 16:53
Last Modified:09 Nov 2021 19:30

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