On the computational aspects of comminution in discrete element method
On the computational aspects of comminution in discrete element method
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DOI：
10.1007/s40571-017-0161-8
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发表时间：
2017-05
影响因子：
3.3
通讯作者：
M. Chaudry;P. Wriggers
中科院分区：
文献类型：
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作者：
M. Chaudry;P. Wriggers
在本文中，解决了颗粒材料破碎/粉碎的计算问题。对于破碎，使用基于最大拉应力的标准。离散元法（DEM）破碎模型容易出现质量守恒和关键时间步缩减问题。第一个问题是通过使用迭代方案来解决的，该方案根据几何空隙恢复粒子的质量。此外，提出了 DEM 问题的全局-局部框架，该框架有助于减轻粒子的局部不稳定运动并提高计算效率。
In this paper, computational aspects of crushing/comminution of granular materials are addressed. For crushing, maximum tensile stress-based criterion is used. Crushing model in discrete element method (DEM) is prone to problems of mass conservation and reduction in critical time step. The first problem is addressed by using an iterative scheme which, depending on geometric voids, recovers mass of a particle. In addition, a global–local framework for DEM problem is proposed which tends to alleviate the local unstable motion of particles and increases the computational efficiency.