Influence of Yield Stress Mismatch on the Creep Stress Field around Crack Tip of Stress Corrosion Cracking

[摘要] To understand the influence of yield stress mismatch on the creep stressfield around crack tip in safe-end dissimilar metal welded joints at primary circuit, the influences of different mismatch coefficients on the creep stress field around the crack front were analyzed using ABAQUS software. Results show thatthe Mises stress distribution is not very different after the creep under different mismatch coefficients.The equivalent plastic strain(PEEQ) in the Nickel based 182 near crack tip is basically remain unchanged and the PEEQ of HAZ is decreasing with the increasing of the mismatch coefficient.The creep strain is mainly concentrated in the crack tip area and there is little change in creep strain under different mismatch coefficients.

[发布机构] School of Mechanical Engineering, Xi'An University of Science and Technology, Xi'an; 710054, China^1;Xi'An Special Equipment Inspection Institute, Xi'an; 710065, China^2

[效力级别] 原子能学

[关键词] ABAQUS software;Creep strain;Creep stress;Equivalent plastic strain;Primary circuits;Safe end