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The Relation Between the Peak Stress for a Blunt Flaw and the Stress Intensity Factor for an Equivalent Crack

[+] Author Affiliations
Edwin Smith

The University of Manchester, Manchester, UK

Paper No. PVP2010-25116, pp. 67-70; 4 pages
doi:10.1115/PVP2010-25116
From:
  • ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference
  • ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B
  • Bellevue, Washington, USA, July 18–22, 2010
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-49255 | eISBN: 978-0-7918-3878-5
  • Copyright © 2010 by ASME

abstract

The paper presents arguments to support the view that the often quoted relation σp = Lim[μKI /(πρ)1/2 ] as ρ (flaw root radius of curvature) tends to zero, with σp being the peak flaw-tip stress, KI , the effective stress intensity factor, and μ = 2, is strictly valid only for the case of an infinitely deep parabolic flaw. The importance of the parameter μ is highlighted with regards to the problem of fracture initiation at the root of a blunt flaw.

Copyright © 2010 by ASME

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