Alternative explanation of stiffening in cross-linked semiflexible networks
Alternative explanation of stiffening in cross-linked semiflexible networks
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DOI：
10.1103/physrevlett.95.178102
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发表时间：
2005-10-21
影响因子：
8.6
通讯作者：
van der Giessen, E
中科院分区：
文献类型：
--
作者：
Onck, PR;Koeman, T;van der Giessen, E
通过对交联半柔性纤维的二维网络模型进行有限应变分析，探讨了丝状蛋白质网络的应变硬化现象。结果表明，硬化是由非仿射网络重排，管理从弯曲为主的响应在小应变到拉伸为主的响应在大应变的过渡。在现有的硬化解释中，纤维丝的起伏是关键，但它只是推迟了过渡。
Strain stiffening of filamentous protein networks is explored by means of a finite strain analysis of a two-dimensional network model of cross-linked semiflexible filaments. The results show that stiffening is caused by nonaffine network rearrangements that govern a transition from a bending-dominated response at small strains to a stretching-dominated response at large strains. Filament undulations, which are key in the existing explanation of stiffening, merely postpone the transition.