Collective stiffening of soft hair assemblies.,Physical Review E

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Collective stiffening of soft hair assemblies.
Physical Review E ( IF 2.2 ) Pub Date : 2020-07-02 , DOI: 10.1103/physreve.102.010602
Jean-Baptiste Thomazo _{1,

2} , Eric Lauga ₃ , Benjamin Le Révérend ₄ , E Wandersman ₁ , A M Prevost ₁

Affiliation

Many living systems use assemblies of soft and slender structures whose deflections allow them to mechanically probe their immediate environment. In this work, we study the collective response of artificial soft hair assemblies to a shear flow by imaging their deflections. At all hair densities, the deflection is found to be proportional to the local shear stress with a proportionality factor that decreases with density. The measured collective stiffening of hairs is modeled both with a microscopic elastohydrodynamic model that takes into account long-range hydrodynamic hair-hair interactions and a phenomenological model that treats the hair assemblies as an effective porous medium. While the microscopic model is in reasonable agreement with the experiments at low hair density, the phenomenological model is found to be predictive across the entire density range.

中文翻译：

柔软头发组件的整体加固。

许多生物系统都使用柔软细长的组件，这些组件的变形使它们能够机械地探测周围的环境。在这项工作中，我们通过成像的挠度来研究人造软毛组合对剪切流的集体响应。在所有头发密度下，都发现挠度与局部剪切应力成比例，比例系数随密度降低。所测量的头发总体僵硬程度是用考虑了长距离水动力头发与头发相互作用的微观弹性流体动力学模型和将头发组件视为有效多孔介质的现象学模型进行建模的。虽然微观模型与低毛发密度的实验相当吻合，

更新日期：2020-07-02

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