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UK Research Programme on Fracture Mechanics: Latest Review of Progress

[+] Author Affiliations
J. K. Sharples

Serco Technical and Assurance Services, Warrington, Cheshire, UK

C. T. Watson

Rolls-Royce plc, Derby, UK

Paper No. PVP2008-61063, pp. 651-660; 10 pages
doi:10.1115/PVP2008-61063
From:
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4829-6
  • Copyright © 2008 by British Crown

abstract

A long-term research programme was launched in the UK in late 2004, a significant part of which is aimed at developing and improving fracture mechanics based methods for assessing the structural integrity of metallic engineering structures and components. The research includes: • Deriving alternative methods for the treatment of combined primary and secondary stresses in fracture mechanics evaluations. • Assessing the effects that cyclic loading and crack growth have on crack driving force parameters so that the significance of ignoring these aspects (as in conventional fracture mechanics methodologies) can be evaluated. • Assessing the validity of the characterisation rules for multiple defects, particularly in view of the fact that previous work has indicated that there may be non-conservatisms in the current rules when applying them to cleavage fracture situations. • Develop guidance on the most relevant way of dealing with weld residual stress profiles in fracture mechanics calculations. This paper presents an overview of the research work being undertaken and provides examples of the outcome of some of the studies obtained to-date.

Copyright © 2008 by British Crown

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