A simpliied fatigue assessment method for transverse illet welded joints

【Author】

Wei Shen;Renjun Yan;Nigel Barltrop;Kai Qin;Feng He;Key Laboratory of High Performance Ship Technology(Wuhan University of Technology),Ministry of Education;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University;Department of Naval Architecture and Marine Engineering,University of Strathclyde;

【Institution】

Key Laboratory of High Performance Ship Technology(Wuhan University of Technology),Ministry of Education;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University;Department of Naval Architecture and Marine Engineering,University of Strathclyde;

【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 dificult to determine due to the complicated correction factors. Three methods for SIF prediction are discussed on illet welded specimens containing continuous or semi-elliptical surface cracks, including the traditional correction method Mk, the approximate correction method Kt, 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 proile Mk, which simpliies 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(ae);;Fatigue strength

References

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Total: 30 articles

  • [1] HUANG Xiao-ping1, CUI Wei-cheng1, SHI De-xin2(1 School of Naval Architecture and Ocean Eng.,Shanghai Jiao Tong University,Shanghai 200030,China; 2 Shipbuilding Engineering Institute,Harbin Engineering University,Harbin 150001,China), Calculation of Fatigue Life of Surface Cracks at Weld Toe of Submarine Cone-cylinder shell, Journal of Ship Mechanics, 2002 (04)
  • [2] HAN Yun~1,HUANG Xiao-ping~1,CUI Wei-cheng~(1,2),HU Yong~2(1.School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200030,China;2.China Ship Scientific Research Center,Wuxi 214082,China), The Simplified Calculation Method of Stress Intensity Factors of Surface Cracks in T-butt Joint, Ship Building of China, 2006 (01)
  • [3] SHEN Wei;YAN Ren-jun;Nigel BARLTROP;YANG Ping;LIU En-qian;QIN Kai;Key Laboratory of High Performance Ship Technology of Ministry of Education, Departments of Naval Architecture,Ocean & Structural Engineering, School of Transportation, Wuhan University of Technology;Department of Naval Architecture and Marine Engineering, University of Strathclyde;, Stress Field Analysis of 135-degree Sharp Corners Based on Notch Stress Strength Theory, Journal of Ship Mechanics, 2015 (03)
  • [4] A simplified fatigue assessment method for high quality welded cruciform joints, International Journal of Fatigue, 2008 (1)

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