Local approach methods are becoming increasingly popular as practical tools for cleavage fracture toughness prediction. Their application involves two distinct elements: calculation of ‘individual’ probabilities of failure, dictated by the local mechanical fields; and summation of these failure probabilities to predict the probability of component failure. In this work, we demonstrate that development of the local approach methods to date has been essentially focused on improving the criterion for predicting local failure as a function of the local mechanical fields. Yet, the existing methods fail to predict with sufficient accuracy the effects of irradiation and defect geometry on fracture toughness when the calculations are based on a common set of model parameters. A possible reason for this, common to all methods, is found in the calculation of the cumulative failure probability, which is based on the weakest-link argument. We discuss the implications of the weakest-link assumption, identify those situations where it needs to be reconsidered, and propose future work that will increase our understanding for improving the calculation of global failure probability.
Skip Nav Destination
ASME 2011 Pressure Vessels and Piping Conference
July 17–21, 2011
Baltimore, Maryland, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4456-4
PROCEEDINGS PAPER
Assessment of Local Approach Methods for Predicting End-of-Life Toughness of RPV Steels
Andrey P. Jivkov,
Andrey P. Jivkov
The University of Manchester, Manchester, UK
Search for other works by this author on:
David P. G. Lidbury,
David P. G. Lidbury
Serco Technical Consulting Services, Warrington, UK
Search for other works by this author on:
Peter James
Peter James
Serco Technical Consulting Services, Warrington, UK
Search for other works by this author on:
Andrey P. Jivkov
The University of Manchester, Manchester, UK
David P. G. Lidbury
Serco Technical Consulting Services, Warrington, UK
Peter James
Serco Technical Consulting Services, Warrington, UK
Paper No:
PVP2011-57546, pp. 293-302; 10 pages
Published Online:
May 21, 2012
Citation
Jivkov, AP, Lidbury, DPG, & James, P. "Assessment of Local Approach Methods for Predicting End-of-Life Toughness of RPV Steels." Proceedings of the ASME 2011 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Baltimore, Maryland, USA. July 17–21, 2011. pp. 293-302. ASME. https://doi.org/10.1115/PVP2011-57546
Download citation file:
4
Views
Related Proceedings Papers
Related Articles
Fracture Probability Integral Applied to Reactor Vessel Life Estimate
J. Pressure Vessel Technol (August,2001)
Guideline on Probabilistic Fracture Mechanics Analysis for Japanese Reactor Pressure Vessels
J. Pressure Vessel Technol (April,2020)
Study on Life Extension of Aged RPV Material Based on Probabilistic
Fracture Mechanics: Japanese Round Robin
J. Pressure Vessel Technol (February,1995)
Related Chapters
Introduction and Definitions
Handbook on Stiffness & Damping in Mechanical Design
Steel Processed by Water Jet Cavitation with Ultrasonic Irradiation
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Acceptance Criteria
Design of Hazardous Mechanical Structures, Systems and Components for Extreme Loads