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A Mesoscopic Damage Model for Predicting the Plastic-Creep Life of Welded Joints Subjected to Quasi-Static Loading

[+] Author Affiliations
Khosrow Zarrabi, Jad Jelwan

The University of New South Wales, Sydney, NSW, Australia

Tahir Mahmood

The L&A Pressure Welding Pty. Ltd., Revesby, NSW, Australia

Paper No. IMECE2010-37042, pp. 51-56; 6 pages
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4446-5
  • Copyright © 2010 by ASME


The integrity and life assessment of welded joints operating at high temperatures and subjected to non-linear damage mechanisms such as plasticity and creep are complex engineering problems and currently the subject of intensive research activities. This paper gauges the accuracy of a model that takes into account creep and plasticity deformation proposed by Zarrabi et al. to a butt welded thick tube. It is shown that the proposed model can predict the life of this welded joint with an error of 1%. Currently the model is being extended to include fatigue deformation.

Copyright © 2010 by ASME
Topics: Creep , Welded joints



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