Semiflexible Filamentous Composites
Semiflexible Filamentous Composites
复制标题
DOI：
10.1103/physrevlett.105.118101
复制
发表时间：
2010-09-08
影响因子：
8.6
通讯作者：
Barkema, G. T.
中科院分区：
文献类型：
--
作者：
Huisman, E. M.;Heussinger, C.;Barkema, G. T.
受到自然界中普遍存在的复合丝状网络的启发，我们研究了由相互连接的松软和坚硬细丝组成的生物聚合物网络模型。在三维空间中进行的数值模拟使我们能够探索应力和应变在刚性部分c（s）和柔性部分c（f）之间的微观分配，并揭示了刚性聚合物的机械行为和相对分数之间的非平凡关系：当几乎没有刚性聚合物时，未膨胀的刚性“内含物”通过包围的松软基质而被保护免于大变形，而在刚性材料的更高分数下，刚性网络独立地扩展并且主导机械响应。
Inspired by the ubiquity of composite filamentous networks in nature, we investigate models of biopolymer networks that consist of interconnected floppy and stiff filaments. Numerical simulations carried out in three dimensions allow us to explore the microscopic partitioning of stresses and strains between the stiff and floppy fractions c(s) and c(f) and reveal a nontrivial relationship between the mechanical behavior and the relative fraction of stiff polymer: when there are few stiff polymers, nonpercolated stiff "inclusions" are protected from large deformations by an encompassing floppy matrix, while at higher fractions of stiff material the stiff network is independently percolated and dominates the mechanical response.