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Emergent Strain-Stiffening in Interlocked Granular Chains

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タイトル: Emergent Strain-Stiffening in Interlocked Granular Chains
著者: Dumont, Denis 著作を一覧する
Houze, Maurine 著作を一覧する
Rambach, Paul 著作を一覧する
Salez, Thomas 著作を一覧する
Patinet, Sylvain 著作を一覧する
Damman, Pascal 著作を一覧する
発行日: 2017年 6月26日
出版者: Cornell University Library
開始ページ: 1707.08547
抄録: 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.
記述: This article is uploaded in "" | This is version 1 | Version2 is linked internal URL
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)



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