Smoothed Particle Hydrodynamics and Discrete Element Method Coupling for Influence of Hexagonal Boron Nitride Lubricant Particle on Friction of Elastic Coarse-Grained Micronscale Iron
Smoothed Particle Hydrodynamics and Discrete Element Method Coupling for Influence of Hexagonal Boron Nitride Lubricant Particle on Friction of Elastic Coarse-Grained Micronscale Iron
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六方氮化硼润滑剂颗粒对弹性粗晶微米铁摩擦影响的光滑颗粒流体动力学与离散元法耦合
DOI：
10.1115/1.4050711
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通讯作者：
L. Sang;Akihiko Yano;Ai I. Osaka;Natsuko Sugimura;H. Washizu
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作者：
L. Sang;Akihiko Yano;Ai I. Osaka;Natsuko Sugimura;H. Washizu
采用光滑粒子流体力学(SPH)和离散元方法(DEM)相结合的方法，研究了六方氮化硼(HBN)颗粒对弹性粗晶微米铁摩擦性能的影响。在各种模拟行为中，hBN润滑剂颗粒显著改善了铁的摩擦性能。颗粒的大小、含有颗粒的空气/水背景以及颗粒的温度都会导致摩擦系数的降低。表面修复、保护膜和能量耗散是减摩的主要机理。此外，值得注意的是，通过这种弹性粗粒化可以清楚地观察到静摩擦和动摩擦。
The present study uses the smoothed particle hydrodynamics (SPH) and discrete element method (DEM) coupling to investigate influence of the hexagonal boron nitride (hBN) particles on friction of the elastic coarse-grained micronscale iron. The hBN lubricant particles significantly improve the friction performance of iron in various simulation behaviors. The particle size, the air/water background containing the particles, and its temperature result in reduction of the friction coefficient. The surface mending, the protective film, and the energy dissipation are the main mechanisms related to the friction reduction. Additionally, it is worthy to note that the static friction and the kinetic friction can be clearly observed by this elastic coarse-graining.