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.
Failure of Carbon Fibers at a Crease in a Fiber-Reinforced Silicone Sheet
Contributed by Applied Mechanics of ASME for publication in the JOURNAL OF APPLIED MECHANICS. 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.
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López Jiménez, F., and Pellegrino, S. (November 19, 2012). "Failure of Carbon Fibers at a Crease in a Fiber-Reinforced Silicone Sheet." ASME. J. Appl. Mech. January 2013; 80(1): 011020. https://doi.org/10.1115/1.4007082
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