Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Phys Rev Lett. 2012 Sep 7;109(10):105703. doi: 10.1103/PhysRevLett.109.105703. Epub 2012 Sep 6.
Simulations are used to determine the effect of inertia on athermal shear of amorphous two-dimensional solids. In the quasistatic limit, shear occurs through a series of rapid avalanches. The distribution of avalanches is analyzed using finite-size scaling with thousands to millions of disks. Inertia takes the system to a new underdamped universality class rather than driving the system away from criticality as previously thought. Scaling exponents are determined for the underdamped and overdamped limits and a critical damping that separates the two regimes. Systems are in the overdamped universality class even when most vibrational modes are underdamped.
模拟用于确定惯性对非热剪切各向同性二维固体的影响。在准静态极限下，剪切通过一系列快速的雪崩来实现。使用数千到数百万个磁盘的有限大小缩放来分析雪崩的分布。惯性使系统进入一个新的欠阻尼通用类，而不是像以前认为的那样使系统远离临界状态。确定了欠阻尼和过阻尼极限以及分离这两个区域的临界阻尼的标度指数。即使大多数振动模式都是欠阻尼的，系统也处于过阻尼通用类。
