Abstract: Basic flow relationships are developed for three typical non-Newtonian lubricant models: the pseudo-plastic model, the circular viscoplastic model, and the ideal viscoplastic model. It is found ...

Abstract: The Reynolds equations for viscoplastic lubricants can be quite complex, involving multiple branches which depend on the form of the boundary conditions invoked in their development. Methods of ...

Abstract: A metalforming inlet zone analysis is developed for a viscoplastic lubricant that is Newtonian below some critical stress level at which it shears plastically. The analysis includes the effects ...

Abstract: A realistic model for friction in lubricated sheet-metal forming which takes account of the different lubrication regimes which may occur at the sheet/tooling interface is developed. Friction is ...