FEA of the relationship between MMM signal and stress in pipeline inspection

Gao Shanbu; Wang Weibin; Bi Wuxi

doi:10.6047/j.issn.1000-8241.2012.02.010

Oil & Gas Storage and Transportation > 2012 > 31(2): 118-120. > DOI: 10.6047/j.issn.1000-8241.2012.02.010

Gao Shanbu, Wang Weibin, Bi Wuxi, . FEA of the relationship between MMM signal and stress in pipeline inspection[J]. Oil & Gas Storage and Transportation, 2012, 31(2): 118-120. DOI: 10.6047/j.issn.1000-8241.2012.02.010

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FEA of the relationship between MMM signal and stress in pipeline inspection

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Author Bio:
Gao Shanbu: reading master, born in 1986, graduated from Chongqing Science and Technology University, oil & gas storage and transportation, in 2009, currently engaged in research of FEA numerical simulation of CP. Add: No.54, Jinguang Road, Guangyang District, Langfang, Hebei, 065000, P. R. China. Tel: 13463437418; Email: 365311351@qq.com
Received Date: March 07, 2011
Available Online: August 20, 2023

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2D Finite Element Analysis (FEA) is performed in order to study the relationship between the Metal Magnetic Memory (MMM) signal and the stress, and the stress-magnetic permeability coupling model and the governing equation for pipe stress and earth magnetic field are applied. First, utilizing the stress distribution calculation function provided by ANSYS, the stress strength distribution of the pipe under 4.5 MPa is computed, then, the earth magnetic field is calculated with the stress-magnetic permeability coupling model. The results show that the stress and the magnetic permeability are related and FEA is capable for detecting the stress signal, hence recognizing the pipe defects.
- pipe,
- MMM inspection,
- stress concentration,
- defect stress,
- magnetic field distribution

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