Steel and Composite Structures

  • 제43권4호
  • /
  • Pages.465-481
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  • 2022
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  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A complete integrity assessment of welded connections under high and low cycle fatigue followed by fracture failure

  • Feng, Liuyang (Department of Civil and Environmental Engineering, National University of Singapore) ;
  • Liu, Tianyao (Department of Civil and Environmental Engineering, National University of Singapore) ;
  • Qian, Xudong (Department of Civil and Environmental Engineering, National University of Singapore) ;
  • Chen, Cheng (Department of Civil and Environmental Engineering, National University of Singapore)
  • 투고 : 2021.10.28
  • 심사 : 2022.04.21
  • 발행 : 2022.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents a comprehensive integrity assessment of welded structural components, including uniform high- and low-cycle fatigue assessment of welded plate joints and fatigue-induced fracture assessment of welded plate joints. This study reports a series of fatigue and fracture tests of welded plate joints under three-point bending. To unify the assessment protocol for high- and low-cycle fatigue of welded plate joints, this study develops a numerical damage assessment framework for both high- and low-cycle fatigue. The calibrated damage material parameters are validated through the smooth coupon specimens. The proposed damage-based fatigue assessment approach describes, with reasonable accuracy, the total fatigue life of welded plate joints under high- and low-cycle fatigue actions. Subsequently, the study performs a tearing assessment on the ductile crack extension of the fatigue-induced crack. The tearing assessment diagram derives from the load-deformation curve of a single-edge notched bend, SE(B) specimen and successfully predicts the load-crack extension relation for the reported welded plate joints during the stable tearing process.

키워드

과제정보

The authors would like to acknowledge the financial contribution provided by the ENSURE PROJECT (Grant no. A19F1a0104) under RIE2020 Advanced Manufacturing and Engineering (AME) Industry Alignment Fund-Pre-Positioning.

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