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A simpliied fatigue assessment method for transverse illet welded joints
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作者 Wei Shen Renjun Yan +2 位作者 Nigel Barltrop Kai Qin Feng He 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2017年第2期198-208,共11页
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. Fractur... 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. 展开更多
关键词 fillet welded joints Stress intensity factor(SIF) Additional crack size(ae) Fatigue strength
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