Stress-Concentration Factors for a Countersunk Hole in a Flat Bar in Tension and Transverse Bending

[+] Author and Article Information
Y. F. Cheng

U.S. Army Armament Research and Development Command, Benet Weapons Laboratory, LCWSL, Watervliet Arsenal, Watervliet, N. Y. 12189

J. Appl. Mech 45(4), 929-932 (Dec 01, 1978) (4 pages) doi:10.1115/1.3424443 History: Received March 01, 1978; Revised June 01, 1978; Online July 12, 2010


A series of three-dimensional photoelastic experiments was performed to determine the maximum stresses and stress-concentration factors at countersunk holes in a flat bar in tension and transverse bending. In the tension case, the maximum stress was found at the base of the countersunk and the stress-concentration factor was approximately 33 percent higher than those found in a straight hole. In the bending case, the neutral plane was shifted toward the surface containing the straight part of the hole and the stress-concentration factor was practically the same as those found in straight holes.

Copyright © 1978 by ASME
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