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RESEARCH PAPERS

Steady-State Thermal Stresses in Wedge-Shaped Cutting Tools

[+] Author and Article Information
P. F. Thomason

Department of Mechanical Engineering, University of Salford, Salford, England

J. Eng. Ind 97(3), 1060-1066 (Aug 01, 1975) (7 pages) doi:10.1115/1.3438656 History: Received March 21, 1974; Online July 15, 2010

Abstract

Closed form expressions for the steady-state thermal stresses in a π/2 wedge, subject to constant-temperature heat sources on the rake and flank contact segments, are obtained from a conformal mapping solution to the steady-state heat conduction problem. It is shown, following a theorem of Muskhelishvili, that the only nonzero thermal stress in the plane-strain wedge is that acting normal to the wedge plane. The thermal stress solutions are superimposed on a previously published isothermal cutting-load solution, to give the complete thermoelastic stress distribution at the wedge surfaces. The thermoelastic stresses are then used to determine the distribution of the equivalent stress, and this gives an indication of the regions on a cutting tool which are likely to be in the plastic state. The results are discussed in relation to the problems of flank wear and rakeface crater wear in metal cutting tools.

Copyright © 1975 by ASME
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