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首页> 外文期刊>The European physical journal, E. Soft matter >Simulation of the mechanical behavior of random fiber networks with different microstructure
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Simulation of the mechanical behavior of random fiber networks with different microstructure

机译：用不同微结构随机纤维网络的力学行为模拟

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摘要

Filamentous protein networks are broadly encountered in biological systems such as cytoskeleton and extracellular matrix. Many numerical studies have been conducted to better understand the fundamental mechanisms behind the striking mechanical properties of these networks. In most of these previous numerical models, the Mikado algorithm has been used to represent the network microstructure. Here, a different algorithm is used to create random fiber networks in order to investigate possible roles of architecture on the elastic behavior of filamentous networks. In particular, random fibrous structures are generated from the growth of individual fibers from random nucleation points. We use computer simulations to determine the mechanical behavior of these networks in terms of their model parameters. The findings are presented and discussed along with the response of Mikado fiber networks. We demonstrate that these alternative networks and Mikado networks show a qualitatively similar response. Nevertheless, the overall elasticity of Mikado networks is stiffer compared to that of the networks created using the alternative algorithm. We describe the effective elasticity of both network types as a function of their line density and of the material properties of the filaments. We also characterize the ratio of bending and axial energy and discuss the behavior of these networks in terms of their fiber density distribution and coordination number.
机译：在细胞骨架和细胞外基质如细胞骨架和细胞外基质等生物系统中广泛遇到丝状蛋白质网络。已经进行了许多数值研究以更好地了解这些网络的机械性能背后的基本机制。在大多数这些先前的数值模型中，Mikado算法已用于表示网络微观结构。这里，使用不同的算法来创建随机光纤网络，以研究架构在丝网的弹性行为上的可能作用。特别地，从随机成核点的单个纤维的生长产生随机纤维结构。我们使用计算机模拟在其模型参数方面确定这些网络的机械行为。随着Mikado光纤网络的响应，提出和讨论了调查结果。我们展示了这些替代网络和Mikado网络显示了定性类似的响应。然而，与使用替代算法创建的网络相比，Mikado网络的总弹性是更硬的。我们描述了两种网络类型的有效弹性，作为其线密度和长丝的材料特性的函数。我们还表征了弯曲和轴向能量的比率，并在其纤维密度分布和协调数方面讨论这些网络的行为。

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