Residual stress effects on fatigue crack growth rate of mild steel S355 exposed to air and seawater environments

Haohui Xin, Milan Veljkovic

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)
16 Downloads (Pure)

Abstract

In this paper, the parameters of fatigue crack growth rate for Q355J2 steel exposed to air and seawater were presented using the “Paris' law” based on the stress intensity factor (SIF), J-integral, crack tip opening displacement (CTOD) and crack tip opening angle (CTOA). The residual stress of a compact tension specimen is analysed by modelling of the welding process based on subsequently thermal mechanical stress analysis. Effect of the residual stresses on the fatigue crack growth rate is investigated by considering the numerically predicted residual stress distribution due to welding. The fatigue crack growth rate based on the parent material considering residual stress effects is compared with welds and the heat affected zone (HAZ).

Original languageEnglish
Article number108732
Number of pages19
JournalMaterials and Design
Volume193
DOIs
Publication statusPublished - 2020

Keywords

  • Crack tip opening angle (CTOA)
  • Crack tip opening displacement (CTOD)
  • Fatigue crack growth rate
  • J-integral
  • Residual stress

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