Hydrodynamic Lubrication in Simple Stretch Forming Processes

Author:

Wilson W. R. D.1,Wang J. J.2

Affiliation:

1. Mechanical and Nuclear Engineering Department, Northwestern University, Evanston, Ill. 60201

2. Mechanical Engineering Department, University of Massachusetts, Amherst, Mass. 01003

Abstract

Theoretical models for the hydrodynamic lubrication of plane strain and axisymmetric sheet metal stretch forming processes with cylindrical and spherical headed punches, respectively, are developed. The lubricant is treated as an isoviscous Newtonian liquid for both geometries. In addition, the influence of sheet heating due to plastic deformation with an exponential variation of viscosity with temperature is analyzed for the plane strain case.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

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