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A Prediction of V-Factor for the Cracked Pipe Under Combined Mechanical and Thermal Stresses With Elastic Follow-Up

[+] Author Affiliations
Tae-Kwang Song, Kuk-Hee Lee, Chang-Young Oh, Yun-Jae Kim

Korea University, Seoul, Korea

Robert A. Ainsworth

British Energy Generation Ltd., Gloucester, UK

Kamran Nikbin

Imperial College London, London, UK

Paper No. PVP2010-25260, pp. 91-95; 5 pages
  • 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


In this paper, a prediction of V-factor, the correction factor for the plasticity interaction between the primary stress and secondary stress, for the cracked pipe under combined mechanical and thermal stresses with significant elastic follow-up is presented. Recently, present authors suggested enhanced V-factor solution using failure assessment curve, which is less conservative than R6 code. However, this solution is limited to weak elastic follow-up condition. The degree of elastic follow-up is related to the variations of Vo with β according to this study. Based on this observation, a prediction solution for the V-factor which can be applied to the crack assessment ranging from weak elastic follow-up condition to strong elastic follow-up condition is proposed.

Copyright © 2010 by ASME



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