交联半柔性网络中硬化现象的另一种解释。
Alternative explanation of stiffening in cross-linked semiflexible networks.
作者信息
Onck P R, Koeman T, van Dillen T, van der Giessen E
机构信息
Micromechanics of Materials, Materials Science Centre, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
出版信息
Phys Rev Lett. 2005 Oct 21;95(17):178102. doi: 10.1103/PhysRevLett.95.178102. Epub 2005 Oct 18.
Abstract
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.
摘要
通过对交联半柔性细丝的二维网络模型进行有限应变分析，探究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引起的，这种重排控制了从小应变下以弯曲为主的响应到在大应变下以拉伸为主的响应的转变。细丝波动在现有的硬化解释中很关键，但它只是推迟了这种转变。
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