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arXiv 1108.4354cond-mat.softphysics.bio-ph
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3D光纤网络中的长度控制弹性

Length-Controlled Elasticity in 3D Fiber Networks

C. P. Broedersz, M. Sheinman, F. C. MacKintosh

摘要:

我们提出了一个无序的三维纤维网络模型,研究其线性和非线性弹性在很宽的网络密度和纤维长度。与以前的2D模型相比,这些具有二元交联的3D网络相对于纤维拉伸弹性受到约束,这表明弯曲可能主导其响应。我们发现,这样的网络表现出纤维长度控制的弯曲制度和交叉的拉伸为主的制度的长度超过一个特征尺度,取决于纤维的弹性性能。最后,通过扩展模型的非线性政权,我们表明,这些网络成为内在的非线性与消失的线性响应制度的限制,软或长的细丝。

英文摘要:

We present a model for disordered 3D fiber networks to study their linear and nonlinear elasticity over a wide range of network densities and fiber lengths. In contrast to previous 2D models, these 3D networks with binary cross-links are under-constrained with respect to fiber stretching elasticity, suggesting that bending may dominate their response. We find that such networks exhibit a fiber length-controlled bending regime and a crossover to a stretch-dominated regime for lengths beyond a characteristic scale that depends on the fiber's elastic properties. Finally, by extending the model to the nonlinear regime, we show that these networks become intrinsically nonlinear with a vanishing linear response regime in the limit of floppy or long filaments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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