Otsuki Michio, Hayakawa Hisao
Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa, Japan.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 May;83(5 Pt 1):051301. doi: 10.1103/PhysRevE.83.051301. Epub 2011 May 10.
The critical rheology of sheared frictional granular materials near jamming transition is numerically investigated. It is confirmed that there exists a true critical density which characterizes the onset of the yield stress and two fictitious critical densities which characterize the scaling laws of rheological properties. We find the existence of a hysteresis loop between two of the critical densities for each friction coefficient. It is noteworthy that the critical scaling law for frictionless jamming transition seems to be still valid even for frictional jamming despite using fictitious critical density values.
对剪切摩擦颗粒材料在堵塞转变附近的临界流变学进行了数值研究。证实存在一个表征屈服应力起始的真实临界密度以及两个表征流变特性标度律的虚拟临界密度。我们发现对于每个摩擦系数，在两个临界密度之间存在一个滞后回线。值得注意的是，尽管使用了虚拟临界密度值，但无摩擦堵塞转变的临界标度律即使对于有摩擦堵塞似乎仍然有效。
