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Emergent Strain-Stiffening in Interlocked Granular Chains

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Title: Emergent Strain-Stiffening in Interlocked Granular Chains
Authors: Dumont, Denis Browse this author
Houze, Maurine Browse this author
Rambach, Paul Browse this author
Salez, Thomas Browse this author
Patinet, Sylvain Browse this author
Damman, Pascal Browse this author
Issue Date: 26-Jun-2017
Publisher: Cornell University Library
Start Page: 1707.08547
Abstract: Granular-chain packings exhibit a striking emerging strain-stiffening behavior despite the individual looseness of their constitutive chains. Using indentation experiments on such assemblies, we measure an exponential increase of the collective resistance force F with the indentation depth z, and with the square root of the number N of beads per chain. These two observations are respectively reminiscent of the self-amplification of friction in a capstan or in interleaved assemblies of sheets, as well as the physics of polymers. The experimental data is well captured by a novel model based on these two ingredients. Specifically, the resistance force is found to vary according to the universal relation: log F ~ μ√NΦ5/8 z/b, where μ is the friction coefficient between two elementary beads, b is the size of such a bead, and Φ is the volume fraction of chains when semi-diluted in a surrounding medium of unconnected beads. Beyond the intrinsic similarity with the polymeric glass transition, this system allows to study friction in complex assemblies, with practical implications for the design of new materials, textile industry, and biology.
Description: This article is uploaded in "" | This is version 1 | Version2 is linked internal URL
Type: article (author version)
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)


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