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arXiv 2209.04237cond-mat.softcond-mat.dis-nncond-mat.mtrl-sci
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无序网络的异常线性弹性

Anomalous linear elasticity of disordered networks

Edan Lerner, Eran Bouchbinder

AI总结:

基于理论与数值计算,本文发现临界刚性转变附近的无序弹性网络在低于关联长度时呈现非仿射的异常长程线性弹性响应,具有不同的多极展开结构和更慢的扰动衰减,并讨论了其普适性及对细胞间通信的意义。

摘要:

连续介质弹性理论是适用于广泛物理系统和现象的强大工具。然而,关于材料无序性如何以及在何种尺度上导致连续介质弹性理论失效,目前尚未完全理解。基于近期理论进展和大量数值计算,我们表明,处于临界刚性转变附近的无序弹性网络(例如在生命系统中大量存在的应变硬化纤维状生物聚合物网络),在低于关联长度时展现出异常的长程线性弹性响应。这种非仿射性质的涌现异常弹性,与普通连续介质弹性理论相比,具有定性不同的多极展开结构,以及更慢的扰动空间衰减。本文还简要讨论了这些结果的潜在普适性程度、其影响(例如对通过生物细胞外基质进行细胞间通信的影响)以及未解决的问题。

英文摘要:

Continuum elasticity is a powerful tool applicable in a broad range of physical systems and phenomena. Yet, understanding how and on what scales material disorder may lead to the breakdown of continuum elasticity is not fully understood. We show, based on recent theoretical developments and extensive numerical computations, that disordered elastic networks near a critical rigidity transition, such as strain-stiffened fibrous biopolymer networks that are abundant in living systems, reveal an anomalous long-range linear elastic response below a correlation length. This emergent anomalous elasticity, which is non-affine in nature, is shown to feature a qualitatively different multipole expansion structure compared to ordinary continuum elasticity, and a slower spatial decay of perturbations. The potential degree of universality of these results, their implications (e.g. for cell-cell communication through biological extracellular matrices) and open questions are briefly discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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