Timescale divergence at the shear jamming transition

Timescale divergence at the shear jamming transition
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剪切干扰转变时的时间尺度发散

DOI:
10.1007/s10035-019-0983-6
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发表时间:
2020
期刊:
影响因子:
2.4
通讯作者:
Sastry, Srikanth
Sastry, Srikanth
中科院分区:
工程技术3区
文献类型:
--
作者:
Vinutha, H. A.;Ramola, Kabir;Chakraborty, Bulbul;Sastry, Srikanth

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我们发现,在准静态剪切摩擦盘的模拟中,剪切干扰的转变可以用粒子间受力接触次数的突然跳跃来表征。该机械配位数从z = 0到临界剪切值不连续地增加,而不是几何接触数的平滑增加。这伴随着发散的时间标度,该时间标度表征了系统在受到扰动时达到力平衡所需的时间。当全局剪切从下面接近临界值时,可以观察到松弛到所有粒子间接触力均为零的状态所花费的时间的散度。以上,系统进入粒子间力有限的状态,时间标度也随着增大。通过使用两种不同的协议来生成力平衡配置,我们表明这种时间尺度发散是伴随剪切干扰过渡的稳健特征。图形抽象
We find that in simulations of quasi-statically sheared frictional disks, the shear jamming transition can be characterized by an abrupt jump in the number of force bearing contacts between particles. Thismechanicalcoordination number increases discontinuously fromZ= 0 toat a critical shear value, as opposed to a smooth increase in the number of geometric contacts. This is accompanied by a diverging timescalethat characterizes the time required by the system to attain force balance when subjected to a perturbation. As the global shearapproaches the critical valuefrom below, one observes the divergence of the time taken to relax to a state where all the inter-particle contacts have uniformly zero force. Above, the system settles into a state characterized by finite forces between particles, with the timescale also increasing as. By using two different protocols to generate force balanced configurations, we show that this timescale divergence is a robust feature that accompanies the shear jamming transition.Graphic abstract
无摩擦盘堵塞填料中的无序接触网络
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发表时间: 2016
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影响因子: --
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K. Ramola;B. Chakraborty
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剪切变形球填料中的力网络和干扰。
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发表时间: 2017
期刊: Physical review. E
影响因子: --
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DOI: 10.1007/s10035-019-0931-5
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