Chapter 5: Theory of Lubrication
This chapter reviews the basic theory of lubrication in the context of metal forming applications. It discusses the rheological properties of fluids and their effect on fluid-film thickness at pressures, temperatures, and loading conditions typical of metal working processes. It describes the three lubrication regimes (boundary, mixed, and hydrodynamic) of a Stribeck curve and the forces that maintain surface separation. It also discusses mixed, elastohydrodynamic, plastohydrodynamic, and solid or semi-solid lubrication, the effects of starvation and frictional instabilities, and the role of elastic deflection and ultrasonic vibration.
Theory of Lubrication, Schey’s Tribology in Metalworking: Friction, Lubrication, and Wear, By Steven R. Schmid, ASM International, 2023, p 64–99, https://doi.org/10.31399/asm.tb.stmflw.t59390064
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