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

In: Numerical Techniques for Engineering Analysis and Design

Author

Listed:
  • 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)

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.

Suggested Citation

  • P. Montmitonnet & J. L. Chenot, 1987. "Coupling of Fluid Film Lubrication and Plastic Deformation: Finite Element Approach of Plastohydrodynamics in Cold Forging," Springer Books, in: G. N. Pande & J. Middleton (ed.), Numerical Techniques for Engineering Analysis and Design, chapter 0, pages 3-11, Springer.
    • Handle: RePEc:spr:sprchp:978-94-009-3653-9_1
    DOI: 10.1007/978-94-009-3653-9_1
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