Kabla A, Mahadevan L
Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
J R Soc Interface. 2007 Feb 22;4(12):99-106. doi: 10.1098/rsif.2006.0151.
Mechanical networks of fibres arise on a range of scales in nature and technology, from the cytoskeleton of a cell to blood clots, from textiles and felts to skin and collageneous tissues. Their collective response is dependent on the individual response of the constituent filaments as well as density, topology and order in the network. Here, we use the example of a low-density synthetic felt of athermal filaments to study the generic features of the mechanical response of such networks including strain stiffening and large effective Poisson ratios. A simple microscopic model allows us to explain these features of our observations, and provides us with a baseline framework to understand active biomechanical networks.
纤维机械网络在自然界和技术领域的一系列尺度上都会出现，从细胞的细胞骨架到血凝块，从纺织品和毛毡到皮肤和胶原组织。它们的集体响应取决于组成细丝的个体响应以及网络中的密度、拓扑结构和有序性。在这里，我们以无热细丝的低密度合成毛毡为例，研究此类网络机械响应的一般特征，包括应变硬化和大的有效泊松比。一个简单的微观模型使我们能够解释观察结果的这些特征，并为理解活性生物力学网络提供了一个基线框架。
