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Acta Mechanica Solida Sinica

, Volume 30, Issue 2, pp 198–208 | Cite as

A simplified fatigue assessment method for transverse fillet welded joints

  • Wei Shen
  • Renjun Yan
  • Nigel Barltrop
  • Kai Qin
  • Feng He
Article
  • 5 Downloads

Abstract

Under the as-welded condition the fatigue crack initiation period was considered nonexistent and Linear Elastic Fracture Mechanics (LEFM) was used to calculate fatigue strength for a range of weld geometries. Fracture mechanics assessment of welded joints requires accurate solutions for stress intensity factor (SIF). However, the solutions for the SIF of complex welded joints are difficult to determine due to the complicated correction factors. Three methods for SIF prediction are discussed on fillet welded specimens containing continuous or semi-elliptical surface cracks, including the traditional correction method M k , the approximate correction method K t , and the suggested additional crack size method (ac+ae). The new additional crack parameter ae is used to replace the stress concentration effect of weld profile M k , which simplifies the calculation process. Experimental results are collected to support fatigue strength assessment of the additional crack size method.

Keywords

Fillet welded joints Stress intensity factor (SIF) Additional crack size (aeFatigue strength 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2017

Authors and Affiliations

  • Wei Shen
    • 1
    • 2
  • Renjun Yan
    • 1
  • Nigel Barltrop
    • 3
  • Kai Qin
    • 1
  • Feng He
    • 1
  1. 1.Key Laboratory of High Performance Ship Technology (Wuhan University of Technology)Ministry of EducationWuhanChina
  2. 2.State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghaiChina
  3. 3.Department of Naval Architecture and Marine EngineeringUniversity of StrathclydeGlasgowUnited Kingdom

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