Fatigue test and life evaluation for a titanium half-pipe weld jacket structure
The fatigue test of a titanium half-pipe weld jacket was conducted,which was welded by argon arc using the technology of double-side formation with one-side welding in a post-treatment titanium dissolving tank for spent nuclear power fuel.According to the results of finite element analysis and tests,the fatigue life of the titanium half-pipe weld jacket structures was evaluated and compared based on the elastic equivalent stress method in ASME Ⅷ-2,the virtual notch stress method in the International Welding Association ⅡW and the extrapolated hot spot stress method in EN 13445.The results show that there is a safe margin for the evaluated life of the titanium half-pipe weld jacket by the PD 5500-D curves as the fatigue design curves of titanium alloy and based on both the elastic equivalent stress method in ASME Ⅷ-2 and the virtual notch stress method in ⅡW.The EN 13445 extrapolated hot spot stress method based on the fatigue design curve G2 is also suitable for the fatigue life evaluation of titanium half-pipe jacket welded structures,and the results obtained also have a safety margin.However,when predicting the fatigue life of the titanium half-pipe jacket welded structure using the extrapolated hot stress method in EN 13445 based on the PD 5500-F2 curve,the evaluated life is too close to the test life,resulting in insufficient safe margin.
titanium half-pipe jacketweld jointfatigue testlife evaluationdesign by analysis
万方数据
维普
