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Fatigue fracture assessment of 10CrNi3MoV welded load-carrying cruciform joints considering mismatch effect
  • +5
  • Song Wei,
  • LIU SONG,
  • Jie Xu,
  • Fan Yu,
  • Shi Hu,
  • He Min,
  • Wang Xiaoxi,
  • Filippo Berto
Jie Xu
China University of Mining and Technology
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Wang Xiaoxi
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Filippo Berto
Norwegian University of Science and Technology
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Abstract

Fatigue experiments and numerical simulations based on the Linear Elastic Fracture Mechanics (LEFM) theory were conducted on the Even-Matched (EM) and Under-Matched (UM) 10CrNi3MoV Load-carrying Cruciform Welded Joints (LCWJs). The study firstly experimentally investigated the Fatigue Crack Growth Rate (FCGR) of base metal, EM, and UM weldments. The corresponding Paris parameters as essential input data are provided to assess the fatigue crack propagation behavior for weld toe and weld root failure of LCWJs. On the one hand, the Stress Intensity Factors (SIFs) at weld toe and weld root were calculated considering the effects of LCWJ specimen geometries, initial crack types, and sizes. The comparisons between simulated results and standards analytical solutions were executed, which exhibit good accordance. It proved that the fatigue fracture simulation procedure based on LEFM is appropriate for the fatigue assessment of LCWJs. Eventually, it conducted the parametric analysis by predicted S-N curves, which included in the weld length, initial crack shape, initial crack size, penetration length, and materials fracture parameter, to explore some safety assessment reference lines for both failure modes of LCWJ.

Peer review status:ACCEPTED

22 Oct 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
22 Oct 2020Submission Checks Completed
22 Oct 2020Assigned to Editor
28 Oct 2020Reviewer(s) Assigned
01 Jan 2021Review(s) Completed, Editorial Evaluation Pending
25 Jan 2021Editorial Decision: Revise Major
03 Feb 20211st Revision Received
04 Feb 2021Submission Checks Completed
04 Feb 2021Assigned to Editor
05 Feb 2021Reviewer(s) Assigned
15 Feb 2021Review(s) Completed, Editorial Evaluation Pending
17 Feb 2021Editorial Decision: Accept