Contact forces of polyhedral particles in discrete element method
Contact forces of polyhedral particles in discrete element method
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DOI：
10.1007/s10035-013-0417-9
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发表时间：
2013-04
期刊：
影响因子：
2.4
通讯作者：
B. Nassauer;M. Kuna
中科院分区：
文献类型：
--
作者：
B. Nassauer;M. Kuna
本文提出了一个适用于任意形状物体的一般接触力定律。首先从赫兹接触定律出发，推导出一种改进的接触力定律。所得的赫兹接触定律公式可应用于任意形状物体的接触。在第二步中，将该接触模型应用于多面体颗粒之间的接触。结果进行了比较，有限元模拟。该模型扩展了阻尼和摩擦的条款。阻尼和摩擦模型的行为证明了简单的例子。力法，然后在离散元法（DEM）中实现。通过对混合器中颗粒运动的模拟，证明了该DEM的应用。
A general contact force law for arbitrarily shaped bodies is presented. At first an advanced contact force law is derived from the well know Hertz contact law. The obtained formulation of the Hertz contact law can be applied to the contact of arbitrarily shaped bodies. In a second step this contact model is applied to the contacts among polyhedral particles. The results are compared to finite element simulations. The model is extended by terms for damping and friction. The behaviour of the damping and friction model are demonstrated with simple examples. The force law is then implemented in the discrete element method (DEM). The application of this DEM is demonstrated by a simulation of the particle movement in a mixer.