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RESEARCH PAPERS

Stress Analysis of O.D. Notched Thick-Walled Cylinders Subjected to Internal Pressure or Thermal Loads

[+] Author and Article Information
J. A. Kapp, G. A. Pflegl

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

J. Pressure Vessel Technol 103(1), 76-84 (Feb 01, 1981) (9 pages) doi:10.1115/1.3263373 History: Received January 11, 1980; Revised July 02, 1980; Online November 05, 2009

Abstract

Finite element stress analysis has been performed to determine the effects of two O.D. notch configurations in a cylinder subjected to internal pressure, or containing autofrettage residual stress. The effects on the residual stresses were determined by simulating these stresses with equivilent temperature loads. The results show that the deeper of the two notch cofigurations is far more severe resulting in a maximum stress concentration factor of 6.6. The shallower notch has a maximum stress concentration factor of 3.7. An additional result is that by introducing notches in autofrettaged cylinders a significant amount of the residual stresses are relieved which indicates that smaller applied pressures can be applied before yielding occurs. The results also show that the possibility of O.D. initiated fatigue failure is greatly increased.

Copyright © 1981 by ASME
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