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Cohesive, frictional powders: contact models for tension Stefan Luding

机译：粘性，摩擦性粉末：张力接触模型Stefan Luding

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摘要

The contacts between cohesive, frictional particles with sizes in the range 0.1-10 μm are the subject of this study. Discrete element model (DEM) simulations rely on realistic contact force models-however, too much details make both implementation and interpretation prohibitively difficult. A rather simple, objective contact model is presented, involving the physical properties of elastic-plastic repulsion, dissipation, adhesion, friction as well as rolling-and torsion-resistance. This contact model allows to model bulk properties like friction, cohesion and yield-surfaces. Very loose packings and even fractal agglomerates have been reported in earlier work. The same model also allows for pressure-sintering and tensile strength tests as presented in this study.
机译：本研究的对象是尺寸在0.1-10μm之间的内聚摩擦颗粒之间的接触。离散元素模型（DEM）模拟依赖于实际的接触力模型，但是，太多的细节使实现和解释都变得异常困难。提出了一个相当简单的客观接触模型，其中涉及弹塑性排斥，耗散，粘附，摩擦以及滚动和扭转阻力的物理特性。该接触模型允许对诸如摩擦，内聚力和屈服面的整体性质进行建模。在较早的工作中已经报道了非常松散的填料，甚至分形的附聚物。相同的模型也允许进行压力烧结和拉伸强度测试，如本研究所述。

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