Analysis of mechanical properties of large particles in contact process and their impact on powder lubrication

Abstract

Impurities or wear particles are almost impossible to avoid during powder lubrication. This condition causes three-body contact with rough surfaces in the condition of mixed in large particles. The mechanical properties of large particles in the process of powder lubrication are analysed in this study by combining the caulking effect, covering effect and three-body elastic contact model. The relationship and influencing factor between load and the contact area and the separation between the two surfaces in the presence of a third body are determined. Furthermore, the impact of large particles on the lubricating effect is analysed. Experiments are conducted to observe the destruction of the powder layer of friction, the impact of large particles and specific forms of damage.