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arXiv 1502.05281cond-mat.soft
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软Condensed Matter中的屈服应力材料

Yield Stress Materials in Soft Condensed Matter

Daniel Bonn, Morton M. Denn, Ludovic Berthier, Thibaut Divoux, Sébastien Manneville

摘要:

我们提出了一个全面的审查屈服应力材料的软凝聚态物质,其中包括广泛的材料从胶体组件和凝胶乳液和非布朗悬浮液的物理行为。所有这些无序的材料显示响应于外部机械力的非线性流动行为,这是由于流动发生的有限力阈值的存在:屈服应力。我们讨论了与这种非线性行为相关的物理起源和流变后果,并给出了一个概述的实验技术,可用于测量屈服应力。我们讨论了屈服应力材料的流动动力学的微观理论描述的最新进展,特别强调松弛时间尺度,剪切流和老化行为之间的相互作用,非均匀剪切流和剪切带的存在,壁滑移和非局部效应在受限的几何形状所发挥的作用。

英文摘要:

We present a comprehensive review of the physical behavior of yield stress materials in soft condensed matter, which encompass a broad range of materials from colloidal assemblies and gels to emulsions and non-Brownian suspensions. All these disordered materials display a nonlinear flow behavior in response to external mechanical forces, due to the existence of a finite force threshold for flow to occur: the yield stress. We discuss both the physical origin and rheological consequences associated with this nonlinear behavior, and give an overview of experimental techniques available to measure the yield stress. We discuss recent progress concerning a microscopic theoretical description of the flow dynamics of yield stress materials, emphasizing in particular the role played by relaxation time scales, the interplay between shear flow and aging behavior, the existence of inhomogeneous shear flows and shear bands, wall slip, and non-local effects in confined geometries.

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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