Grill Maximilian J, Kernes Jonathan, Slepukhin Valentin M, Wall Wolfgang A, Levine Alex J
Institute for Computational Mechanics, Technical University of Munich, 85748 Garching, Germany.
Department of Physics & Astronomy, University of California, Los Angeles, 90095, USA.
Soft Matter. 2021 Nov 24;17(45):10223-10241. doi: 10.1039/d0sm01177k.
We consider the propagation of tension along specific filaments of a semiflexible filament network in response to the application of a point force using a combination of numerical simulations and analytic theory. We find the distribution of force within the network is highly heterogeneous, with a small number of fibers supporting a significant fraction of the applied load over distances of multiple mesh sizes surrounding the point of force application. We suggest that these structures may be thought of as tensile force chains, whose structure we explore simulation. We develop self-consistent calculations of the point-force response function and introduce a transfer matrix approach to explore the decay of tension (into bending) energy and the branching of tensile force chains in the network.
我们使用数值模拟和解析理论相结合的方法，研究了在施加点力时，张力在半柔性丝状网络的特定细丝上的传播情况。我们发现网络内的力分布高度不均匀，在力施加点周围多个网格尺寸的距离上，少数纤维承受了相当一部分的外加负载。我们认为这些结构可被视为张力链，我们通过模拟来探索其结构。我们开发了点力响应函数的自洽计算方法，并引入转移矩阵方法来研究网络中张力（转化为弯曲）能量的衰减以及张力链的分支情况。
