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Significance of third body rheology in friction at a dry sliding interface observed by a multibody meshfree model: Influence of cohesion between particles
Tribology international ( IF 3.517 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.triboint.2020.106188
Yinyin Zhang; Guilhem Mollon; Sylvie Descartes

The third body approach deals with friction as a problem of third body rheology. Using a multibody meshfree model, we report influence of cohesion on third body rheology and friction at a dry sliding contact. With cohesion increasing from 0.0001 to 20 GPa, friction firstly increases linearly then transitions to a constant value, based on which three friction regimes are identified. Low cohesion (0.0001–1 GPa) is featured by lamellar flow; medium cohesion (1–5 GPa) triggers formation of strong inclined force chains; high cohesion (5–20 GPa) results in generation and rolling of agglomerates. How third bodies accommodate velocity gradient and transfer load are carefully examined. The results provide a possible novel approach of material design to monitor the coefficient of friction.
更新日期:2020-01-13

 

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