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Approximate Analysis of Creep Strains and Stresses at Notches

[+] Author Affiliations
J. E. Nuñez, G. Glinka

University of Waterloo, Waterloo, Ontario, Canada

Paper No. PVP2003-1888, pp. 41-49; 9 pages
doi:10.1115/PVP2003-1888
From:
  • ASME 2003 Pressure Vessels and Piping Conference
  • Computer Technology and Applications
  • Cleveland, Ohio, USA, July 20–24, 2003
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-1699-0
  • Copyright © 2003 by ASME

abstract

A method for the estimation of creep induced strains and stresses at notches has been developed. The purpose of the method is to generate a solution for the time-dependent strain and stress at the notch root based on the linear-elastic stress state, the constitutive law, and the material creep model. The proposed solution is an extension of Neuber’s rule used for the case of time-independent plasticity. The method was derived for both localized and non-localized creep in a notched body. Predictions were compared with finite element data and good agreement was obtained for various geometrical and material configurations in plane stress conditions.

Copyright © 2003 by ASME
Topics: Creep , Stress

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