Correlated heterogeneous deformation of entangled fiber networks.
Correlated heterogeneous deformation of entangled fiber networks.
复制标题
缠结纤维网络的相关异质变形。
DOI：
10.1103/physreve.84.031904
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
G. Subramanian
中科院分区：
文献类型：
--
作者：
R. C. Picu;G. Subramanian
本文研究了非交联半柔性纤维缠结网络在压缩作用下的变形。我们发现，变形是间歇性的，异质性，并主导雪崩的发生。雪崩意味着相对的纤维滑动和重排，并导致锯齿状的应力应变曲线。系统中的大部分纤维有助于雪崩，并且滑动事件的幅度在空间上是相关的。这种现象在纤维之间有摩擦和没有摩擦的系统中是定性相似的，并且不是由于摩擦粘滑。
We study the deformation of a network of entangled non-cross-linked semiflexible fibers subjected to compression. We show that the deformation is intermittent, heterogeneous, and dominated by the occurrence of avalanches. Avalanches imply relative fiber sliding and rearrangement and lead to a serrated stress-strain curve. A large fraction of the fibers in the system contribute to an avalanche, and the amplitudes of the sliding events are correlated spatially. This phenomenon is qualitatively similar in systems with and without friction between fibers and is not due to frictional stick slip.