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arXiv 1807.01205cond-mat.softphysics.bio-ph
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纤维网络力学临界行为的标度理论

Scaling theory for mechanical critical behavior in fiber networks

Jordan Shivers, Sadjad Arzash, Abhinav Sharma, Fred C. MacKintosh

摘要:

作为一个函数的连接,弹簧网络表现出一个关键的转变之间的软和刚性阶段的均衡阈值。对于低于这个阈值的连接,纤维网络最近在理论上显示出具有作为应变的函数的相应临界签名的刚性过渡。实验胶原蛋白网络也被证明与这些预测一致。我们开发了一个应变控制过渡的标度理论。使用实空间重正化方法,我们确定的临界指数之间的关系,我们验证了应变控制的过渡,使用数值模拟的三角形晶格为基础的和包装衍生的纤维网络。

英文摘要:

As a function of connectivity, spring networks exhibit a critical transition between floppy and rigid phases at an isostatic threshold. For connectivity below this threshold, fiber networks were recently shown theoretically to exhibit a rigidity transition with corresponding critical signatures as a function of strain. Experimental collagen networks were also shown to be consistent with these predictions. We develop a scaling theory for this strain-controlled transition. Using a real-space renormalization approach, we determine relations between the critical exponents governing the transition, which we verify for the strain-controlled transition using numerical simulations of both triangular lattice-based and packing-derived fiber networks.

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