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arXiv 0806.4653cond-mat.softcond-mat.dis-nn
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无规密堆积附近软颗粒和胶体的弹性

Elasticity of soft particles and colloids near Random Close Packing

Matthieu Wyart

摘要:

纯粹排斥和无摩擦的颗粒,如乳液或硬球,显示非常奇怪的性能附近的堵塞过渡,这发生在随机紧密堆积的单分散球。虽然这样的体系不包含表征橡胶的长的和交联的聚合物链,但是它们以类似的方式宏观地表现:剪切模量$G$可以变得比体积模量$B$无限小。在回顾了最近的理论结果的结构,这种包装(特别是他们的协调),我将提出一个解释所观察到的缩放的弹性模量,并解释为什么参数都适用于软和硬颗粒。

英文摘要:

Assemblies of purely repulsive and frictionless particles, such as emulsions or hard spheres, display very curious properties near their jamming transition, which occurs at the random close packing for mono-disperse spheres. Although such systems do not contain the long and cross-linked polymeric chains characterizing a rubber, they behave macroscopically in a similar way: the shear modulus $G$ can become infinitely smaller than the bulk modulus $B$. After reviewing recent theoretical results on the structure of such packing (in particular their coordination) I will propose an explanation for the observed scaling of the elastic moduli, and explain why the arguments both apply to soft and hard particles.

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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