Vol.4 No.6 (November 2014)
Finite Element Simulation for Remote Field Eddy Current and Detection Sensitivity Analysis for Inner and Outer Defect
Remote Field Eddy Current (RFEC) is an important branch cut of eddy current nondestructive testing (NDT) technique, and is drawing more and more attention in the testing and repairing of pipes and tubes. The finite element method used for RFEC simulation was researched in this thesis with detail. Firstly, some important phenomena of RFEC technique such as “amplitude canyon” and “phase knot” were simulated and analyzed. At the same time, to clarify the superiority of RFEC technology used for ferromagnetic tube compared with conventional eddy current, differential defects in “near field” and “remote field” were chosen to simulate and analyzed; Finally, advantages of remote field eddy current for ferromagnetic tube NDT were drawn compared with conventional eddy current.
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