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Decay Length in Pressure Vessels

[+] Author Affiliations
R. Adibi-Asl

AMEC NSS Ltd., Toronto, ON, Canada

R. Seshadri

Memorial University, St. John’s, NL, Canada

Paper No. PVP2017-66135, pp. V002T02A012; 11 pages
  • ASME 2017 Pressure Vessels and Piping Conference
  • Volume 2: Computer Technology and Bolted Joints
  • Waikoloa, Hawaii, USA, July 16–20, 2017
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5793-9
  • Copyright © 2017 by ASME


In theory of shell, decay length is defined as the distance affected by localized external (applied loads) or internal (edge effect, discontinuity) forces and moments, beyond which the effect of these loads becomes negligible. The concept of decay length becomes relevant when assessing the interaction effects caused by adjacent discontinuities.

In this paper, the decay lengths for several shells geometries, specifically cylindrical, spherical and conical shells, are reviewed. The available expressions for decay lengths in the literature are listed and are compared with finite element analysis to demonstrate the accuracy of some of the solutions.

Copyright © 2017 by ASME



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