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Failure of Carbon Fibers at a Crease in a Fiber-Reinforced Silicone Sheet

Lόpez Jiménez, Francisco and Pellegrino, Sergio (2013) Failure of Carbon Fibers at a Crease in a Fiber-Reinforced Silicone Sheet. Journal of Applied Mechanics, 80 (1). Art. No. 011020. ISSN 0021-8936. http://resolver.caltech.edu/CaltechAUTHORS:20130204-114025514

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Abstract

Thin sheets of unidirectional carbon fibers embedded in a silicone matrix can be folded to very high curvatures, as elastic microbuckles with a half-wavelength on the order of 1 mm decrease the maximum strain in the fibers near the compression surface. This paper shows that probabilistic failure models derived from tension tests on individual fibers can be used to predict accurately the value of the outer surface curvature of the sheet, at which a small percentage of fibers break when a crease is formed in the sheet. The most accurate results are obtained by using a strain-based Weibull distribution of the failure probability in tension.


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http://dx.doi.org/10.1115/1.4007082DOIUNSPECIFIED
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Additional Information:© 2013 American Society Mechanical Engineers. Manuscript received November 5, 2011; final manuscript received April 9, 2012; accepted manuscript posted July 6, 2012; published online November 19, 2012. Editor: Robert M. McMeeking. We thank Dr. Thomas Murphey (AFRL) and Professor Zhigang Suo (Harvard University) for helpful comments and L’Garde Inc. for providing test samples.
Record Number:CaltechAUTHORS:20130204-114025514
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130204-114025514
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36757
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:04 Feb 2013 23:56
Last Modified:04 Feb 2013 23:56

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