The material-point method for granular materials
The material-point method for granular materials
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DOI：
10.1016/s0045-7825(99)00338-2
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发表时间：
2000-07
影响因子：
7.2
通讯作者：
S. Bardenhagen;J. Brackbill;D. Sulsky
中科院分区：
文献类型：
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作者：
S. Bardenhagen;J. Brackbill;D. Sulsky
提出了一个颗粒材料模型，该模型既描述了每个颗粒的内部变形，又描述了颗粒之间的相互作用。该模型基于FLIP-物质点、质点网格法，求解了每个颗粒的连续本构模型。颗粒之间的相互作用是通过接触算法计算的，该算法禁止相互渗透，但允许分离、滑动和摩擦滚动。颗粒池法消除了对单独接触检测步骤的需要。在接触模型中使用一个共同的休息框架产生的计算成本与晶粒数的线性缩放。滑动和滚动接触的数值解，并通过剪切计算粒状材料的模型的属性说明。数值计算的结果表明，接触准确地模拟了光滑颗粒，其形状是由计算网格解决。
A model for granular materials is presented that describes both the internal deformation of each granule and the interactions between grains. The model, which is based on the FLIP-material point, particle-in-cell method, solves continuum constutitive models for each grain. Interactions between grains are calculated with a contact algorithm that forbids interpenetration, but allows separation and sliding and rolling with friction. The particle-in-cell method eliminates the need for a separate contact detection step. The use of a common rest frame in the contact model yields a linear scaling of the computational cost with the number of grains. The properties of the model are illustrated by numerical solutions of sliding and rolling contacts, and for granular materials by a shear calculation. The results of numerical calculations demonstrate that contacts are modeled accurately for smooth granules whose shape is resolved by the computations mesh.