CNR-SPIN, Department of Physical Sciences, University of Naples Federico II, 80126 Napoli, Italy.
Phys Rev Lett. 2010 Jun 11;104(23):238001. doi: 10.1103/PhysRevLett.104.238001. Epub 2010 Jun 9.
The unjamming transition of granular systems is investigated in a seismic fault model via three dimensional molecular dynamics simulations. A two-time force-force correlation function, and a susceptibility related to the system response to pressure changes, allow us to characterize the stick-slip dynamics, consisting in large slips and microslips leading to creep motion. The correlation function unveils the micromechanical changes occurring both during microslips and slips. The susceptibility encodes the magnitude of the incoming microslip.
通过三维分子动力学模拟研究了颗粒系统在地震断层模型中的解缠结转变。双时力-力相关函数和与系统对压力变化响应相关的磁化率允许我们表征由大滑动和微滑动导致蠕动运动的粘滑动力学。相关函数揭示了微滑动和滑动过程中发生的细观力学变化。磁化率编码了进入微滑动的幅度。
