Effect of Residual Stresses on Ductile Crack Growth in Pipeline Steel

Abstract:

In this study, the effects of residual stresses on the ductile crack growth resistance was investigated using single-edge-notched bending (SENB) and single-edge-notched tension (SENT) specimens as well as axisymmetric model. Weld residual stresses were introduced by the so-called eigenstrain method. The crack tip opening displacement (CTOD) and constraint parameter R were calculated for different specimens and residual stresses. Results show that the residual stresses slightly reduced the ductile crack growth resistance. However, crack tip constraint R elevated with the increase of residual stress.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 403-408
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.403
• Online since: March 2016
• Authors: Xiao Min Zhuo, Jie Xu, Peng Peng Li, Yu Fan, Zhi Sun
• Keywords: CTOD-Resistance Curve, Eigenstrain Method, Residual Stress, Single-Edge-Notched Bending (SENB) Specimen, Single-Edge-Notched Tension (SENT) Specimen

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