Analysis of Drill Stress by Three-Dimensional Photoelasticity

[+] Author and Article Information
S. S. Law

Singapore Polytechnic; Mechanical Engineering Department, University of Wisconsin, Madison, Wisc.

M. F. DeVries, S. M. Wu

Department of Mechanical Engineering, University of Wisconsin, Madison, Wisc.

J. Eng. Ind 94(4), 965-970 (Nov 01, 1972) (6 pages) doi:10.1115/1.3428347 History: Received July 20, 1971; Online July 15, 2010


An exploratory drill point stress analysis was obtained experimentally using a three-dimensional photoelastic technique. A drill model was stress-frozen under simulated drilling conditions and seven segments were sliced perpendicular to and along the cutting edge for subsequent photoelastic analysis. Isochromatic fringe patterns from slices close to the drill periphery suggest an action analogous to orthogonal cutting. Generally, stresses become more compressive as the cutting edge or the outer corner is approached. A maximum shear stress was found to exist along the cutting edge at a point about three-fourths of the distance from the chisel edge and was noted to be similar to a previously determined cutting edge temperature distribution.

Copyright © 1972 by ASME
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