Coupling of Fluid Film Lubrication and Plastic Deformation: Finite Element Approach of Plastohydrodynamics in Cold Forging

P. Montmitonnet and J. L. Chenot
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P. Montmitonnet: Ecole Des Mines De Paris. Centre De Mise En Forme Sophia Antipolis
J. L. Chenot: Ecole Des Mines De Paris. Centre De Mise En Forme Sophia Antipolis

Chapter D1 in Numerical Techniques for Engineering Analysis and Design, 1987, pp 3-11 from Springer

Abstract: Abstract A full fluid film lubrication mechanism is analyzed and implemented in a home-made elastic-plastic finite element code dedicated to metal forming. A realistic lubricant rheology accounting for high pressure and shear-rate has been assumed. The evolution of film thickness -and hence friction stress- may be followed all along a non-stationary process. Cold upsetting between flat, overhanging dies has been chosen as a first, simple example. Several finite difference schemes have been tested to solve the lubricant conservation equation, and their stability and precision is discussed. Numerical results are compared quantitatively with analytical solution (for the case of homogeneous deformation) or qualitatively with experimental results.

Keywords: Friction Stress; Plane Strain Deformation; Limit Shear Stress; Fluid Film Lubrication; Cold Forge (search for similar items in EconPapers)
Date: 1987
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-94-009-3653-9_1

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DOI: 10.1007/978-94-009-3653-9_1

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