Study on the eddy current testing model of “CFRP-bond-steel” multilayer and heterogeneous media

Liang Ke; Zhi-ping Liu; Xiaoli Jiang; Da Qiang Li

doi:10.3963/j.issn.1671-4431.2016.06.015

Study on the eddy current testing model of “CFRP-bond-steel” multilayer and heterogeneous media

Liang Ke, Zhi-ping Liu, Xiaoli Jiang, Da Qiang Li

Transport Engineering and Logistics

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

The hypothesis of "quasi-isotropic CFRP" was proposed considering that CFRP was constituted by multiple layers. An analytical model of eddy-current problem in CFRP-bond-steel media was constructed and its integral solution was obtained on the basis of the axisymmetric eddy-current field. The integral solution was transformed into series expansions for the convenience in calculation and accuracy controll, then Mathematica was used to get the numeral value of coil impedance change. Finally, the practical anisotropic CFRP was modeled in COMSOL Multiphysics to validate the analytical results and the "quasi-isotropic CFRP" hypothesis. This research can provide a theoretical basis for eddy-current testing to be used in CFRP-strengthened steel structures.

Original language	Chinese
Pages (from-to)	89-96
Journal	Wuhan Ligong Daxue Xuebao (Journal of Wuhan University of Technology)
Volume	38
Issue number	6
DOIs	https://doi.org/10.3963/j.issn.1671-4431.2016.06.015
Publication status	Published - 2016

Keywords

Analytical solution
CFRP
Coil impedance
Eddy-current field
Quasi-isotropic

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10.3963/j.issn.1671-4431.2016.06.015

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AU - Ke, Liang

AU - Liu, Zhi-ping

AU - Jiang, Xiaoli

AU - Li, Da Qiang

PY - 2016

Y1 - 2016

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AB - The hypothesis of "quasi-isotropic CFRP" was proposed considering that CFRP was constituted by multiple layers. An analytical model of eddy-current problem in CFRP-bond-steel media was constructed and its integral solution was obtained on the basis of the axisymmetric eddy-current field. The integral solution was transformed into series expansions for the convenience in calculation and accuracy controll, then Mathematica was used to get the numeral value of coil impedance change. Finally, the practical anisotropic CFRP was modeled in COMSOL Multiphysics to validate the analytical results and the "quasi-isotropic CFRP" hypothesis. This research can provide a theoretical basis for eddy-current testing to be used in CFRP-strengthened steel structures.

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Study on the eddy current testing model of “CFRP-bond-steel” multilayer and heterogeneous media

Abstract

Keywords

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