Advances in Residual Stress Modeling and Measurement for the Structural Integrity Assessment of Welded Thermal Power Plant |
| Journal |
Advanced Materials Research (Volumes 41 - 42) |
| Volume |
Structural Integrity and Failure |
| Edited by |
Xiaozhi Hu, Brent Fillery, Tarek Qasim and Kai Duan |
| Pages |
391-400 |
| DOI |
10.4028/www.scientific.net/AMR.41-42.391 |
| Online since |
April, 2008 |
| Authors |
Lyndon Edwards,
Mike C. Smith,
Mark Turski,
Michael E. Fitzpatrick,
P. John Bouchard
|
| Keywords |
Finite Element Validation, Residual Stress, Structural Integrity, Welded Power Plant |
| Abstract |
The safe operation of both thermal and nuclear power plant is increasingly dependent
upon structural integrity assessment of pressure vessels and piping. Furthermore, structural failures
most commonly occur at welds so the accurate design and remnant life assessment of welded plant
is critical. The residual stress distribution assumed in defect assessments often has a deciding
influence on the analysis outcome, and in the absence of accurate and reliable knowledge of the
weld residual stresses, the design codes and procedures use assumptions that yield very conservative
assessments that can severely limit the economic life of some plant. However, recent advances in
both the modeling and measurement of residual stresses in welded structures and components open
up the possibility of characterising weld residual stresses in operating plant using state-of–the–art
fully validated Finite Element simulations. This paper describes research undertaken to predict
residual stresses in stainless steel welds in order to provide validated reliable, accurate Structural
Integrity assessment of nuclear power plant components |
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