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RESEARCH PAPERS

On the Plane Stress to Plane Strain Transition Across the Shear Zone in Metal Cutting

[+] Author and Article Information
B. E. Klamecki, S. Kim

Department of Mechanical Engineering and Productivity Center, University of Minnesota, Minneapolis, MN 55455

J. Eng. Ind 110(4), 322-325 (Nov 01, 1988) (4 pages) doi:10.1115/1.3187889 History: Received December 01, 1986; Online July 30, 2009

Abstract

The effects of the stress state transition from plane stress at the workpiece surface to plane strain in the central region of the chip formation zone were studied. A finite element analysis of the incipient chip formation process was performed. The model included heat generation and temperature induced workpiece material property changes. The primary result is that the unique high strain, high strain rate, large free surface characteristics of the metal cutting process can result in qualitatively different deformation behavior across the shear zone. Temperatures are higher in the regions near the surface of the workpiece than in the central region. In extreme cases, this will result in strain hardening behavior in the plain strain regions and thermal softening of the work material near the surface.

Copyright © 1988 by ASME
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