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one publication added to basket [242009]
Sensitivity of plastic response of defective pipeline girth welds to the stress-strain behavior of base and weld metal
Hertelé, S.; De Waele, W.; Denys, R.; Verstraete, M. (2011). Sensitivity of plastic response of defective pipeline girth welds to the stress-strain behavior of base and weld metal, in: OMAE2011: Proceedings of the ASME 30th international conference on ocean, offshore and arctic engineering, Vol 2: structures, safety and reliability. pp. 165-175. http://dx.doi.org/10.1115/OMAE2011-49239
In: (2011). OMAE2011: Proceedings of the ASME 30th international conference on ocean, offshore and arctic engineering, Vol 2: structures, safety and reliability. American Society of Mechanical Engineers (ASME): New York. ISBN 9780791844342.

Available in  Authors 
Document type: Conference paper

Keyword
    Marine/Coastal

Authors  Top 
  • Hertelé, S.
  • De Waele, W.
  • Denys, R.
  • Verstraete, M.

Abstract
    One of the key parameters influencing the acceptability of a pipeline girth weld defect subjected to remote plastic deformation is the strength mismatch between weld and base metal. However, no single definition exists for weld strength mismatch, as it can be defined either on the basis of yield stress, ultimate tensile stress or any intermediate flow stress. To investigate the relevance of such definitions, the authors have performed a series of analyses of curved wide plate tests, using a validated parametric finite element model. The results indicate that, whereas yield stress overmatch determines crack driving force for small plastic strains, ultimate tensile stress overmatch is the more important parameter for advanced plastic strains and determines the eventual failure mode. Further, the strain capacity and exact crack driving force curve are additionally determined by uniform elongation and crack growth resistance.

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