| METALS AND METAL MATRIX COMPOSITES |
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| A Fluid-solid-magnetic Coupling Method for the Crack Growth in Pipe Welds Considering the Fluid Permeation Pressure |
| CUI Wei, ZHANG Yuhang, ZHANG Qiang, FENG Ziming
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| College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318 |
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Abstract Aiming at detecting the dynamic crack growth in the weld of the in-service pipeline by magnetic flux leakage method, a fluid-solid-magnetic coupling method considering the fluid permeation pressure was proposed. Through establishing the fluid-solid-magnetic field model in pipeline weld, the coupling equation of fluid-solid magnetic multi-field could be constructed, and the crack propagation in pipeline weld could be calculated, which contribute to the mesh reconstruction around the cracks and the analysis of the leakage magnetic field in the process of crack propagation in the pipeline weld. The results indicated that the the process of internal crack growth was accelerated by the fluid osmotic pressure. The pipe welds considering the fluid permeation pressure were threatened by more serious danger than that without the fluid permeation pressure. Meanwhile, the fluid-solid-magnetic multi-field coupling method considering the fluid permeation pressure was more suitable for the practical enginee-ring, which could accurately characterize the degree of the crack growth in pipe welds, judge the dangerous grade of the weld damage in pipelines. And it has provided a more effective way for characterization and evaluation of the crack growth in pipe welds under fluid-solid magnetic multi-field coupling condition.
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Published: 03 April 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51607035,11502051,51774091,51674090), the Heilongjiang Youth Innovation Talents of Ordinary Undergraduate Colleges and Universities (UNPYSCT-2018046), the China Postdoctoral Science Foundation (2018M641804), Heilongjiang Postdoctoral Research Foundation (LBH-Q18029). |
| About author:: Wei Cui received her Ph.D. degree in June 2013 from Northeast Petroleum University in engineering. Yuhang Zhang received his Bachelor's degree in chemical process equipment from Northeast Petroleum University in 2017. He is currently a postgraduate. Qiang Zhang received his Ph.D. degree in June 2011 from Northeast Petroleum University in engineering. He is currently an associate professor. |
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2019, Vol. 33 
