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arXiv 1407.3676cond-mat.softphysics.bio-phq-bio.CB
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活性固体中的应力重组和响应

Stress reorganisation and response in active solids

Rhoda J. Hawkins, Tanniemola B. Liverpool

摘要:

我们提出了一个微观模型的无序粘弹性活性固体,即活性材料的长期行为是弹性的,而不是粘性。它由细丝、被动交联和由储存的化学能提供动力的分子马达组成,例如由ATP提供动力的肌动球蛋白。我们的模型使我们能够研究收缩性主动元件的集体行为,以及它们之间的相互作用和被动弹性元件如何决定主动材料的宏观力学性能。作为一个结果的(非)约束力的动态的活性元素,我们发现,该系统提供了一个高度响应的材料与动态的机械响应强烈依赖于变形量。

英文摘要:

We present a microscopic model of a disordered viscoelastic active solid, i.e. an active material whose long time behaviour is elastic as opposed to viscous. It is composed of filaments, passive crosslinks and molecular motors powered by stored chemical energy, e.g. actomyosin powered by ATP. Our model allows us to study the collective behaviour of contractile active elements and how their interaction with each other and the passive elastic elements determines the macroscopic mechanical properties of the active material. As a result of the (un)binding dynamics of the active elements, we find that this system provides a highly responsive material with a dynamic mechanical response strongly dependent on the amount of deformation.

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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