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- W4306173887 endingPage "104825" @default.
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- W4306173887 abstract "The magnetic-based stress detection technology has a great application potential in the field of girth weld stress detection. However, this technology lacks an effective theoretical model as a scientific guide. Therefore, to investigate the quantitative relationship between the magnetic gradient signal and weld stress and quantitatively evaluate the stress status of girth welds. In this paper, a numerical simulation model of stress-induced magnetic signals of girth welds with unequal wall thickness (UWT) is first established. Then, the model is used to calculate and analyse the quantitative variation law of the magnetic gradient signal of the girth weld with stress and detection height. Moreover, a magnetic-based stress detection and risk evaluation method is established to assess the stress failure risk of girth welds with UWT, whose accuracy is experimentally validated. The results indicate that the residual strength ratio RSR exponentially reduces from 0.83 to 0.49 as the Gmax increases from 373 to 542 μT/m. Moreover, the goodness of fit of the experimental data based on this relationship mentioned above reaches 0.98. The magnetic signal also exhibits a decaying exponential trend with detection height (0.1 m–0.3 m) when the internal pressure varies within 3 MPa–9 MPa. The numerical range of the RSR of seven girth welds is 0.31–0.95, which shows good agreement with the contact inspection results." @default.
- W4306173887 created "2022-10-14" @default.
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- W4306173887 date "2022-12-01" @default.
- W4306173887 modified "2023-10-14" @default.
- W4306173887 title "Quantitative study on magnetic-based stress detection and risk evaluation for girth welds with unequal wall thickness of high-grade steel pipelines" @default.
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- W4306173887 doi "https://doi.org/10.1016/j.jngse.2022.104825" @default.
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