颗粒集合体的弱化问题
Aspects of weakening in granular assemblies
摘要：
本文研究了在缓慢增加的偏应力作用下大的（N~10^4）二维准静态颗粒集合体的数值模拟。我们报告的一些特殊性，在这些包装的行为，尚未解决。滑动接触的数量不一定与稳定性相关：首先，滑动接触的数量随着施加的应力线性且平滑地增加。然后，在大约一半的峰值应力，增加放缓，平台的发展，并随之下降。
英文摘要：
We study numerical simulations of large (N~10^4) two-dimensional quasi-static granular assemblies subjected to a slowly increasing deviator stress. We report some peculiarities in the behavior of these packings that have not yet been adressed. The number of sliding contacts is not necessarily related to stability: first the number of sliding contacts rises linearly and smoothly with the applied stress. Then, at approximately half the peak stress, the increase slows down, a plateau develops, and a decrease follows.
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