Journal article

Direct simulations of fiber network deformation and failure

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Author list: Uesaka, Tetsu

Publication year: 2012

Start page: 1

End page: 14

Number of pages: 14

ISSN: 0167-6636

DOI: http://dx.doi.org/10.1016/j.mechmat.2012.03.010

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Abstract

A finite element model for 3D random fiber networks was constructed to simulate deformation and failure behavior of networks with dynamic bonding/debonding properties. Such fiber networks are ubiquitous among many living systems, soft matters, bio-materials, and engineering materials (papers and non-woven). A key feature of this new network model is the fiber-fiber interaction model that is based on AFM measurements from our earlier study. A series of simulations have been performed to investigate strain localization behavior, strength statistics, in particular, the variations of strength, strain-to-failure and elastic modulus, and their size dependence. Other variables investigated are fiber geometries. The result showed that, in spite of its disordered structure, strength and elastic modulus of a fiber network varied very little statistically, as long as the average number of fibers in the simulated specimen and the degree of fiber orientation are kept constant. However, strain-to-failure showed very significant statistical variations, and thus more sensitivity to the disordered structures. (C) 2012 Elsevier Ltd. All rights reserved.


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