Analysis of the magnetic field in the presence of linear sub surface cracks using ECT

Authors

  • Dario Pasadas Instituto de Telecomunicações and Instituto Superior Técnico, Lisbon, Portugal
  • Artur Lopes Ribeiro Instituto de Telecomunicações and Instituto Superior Técnico, Lisbon, Portugal
  • Helena Geirinhas Ramos Instituto de Telecomunicações and Instituto Superior Técnico, Lisbon, Portugal

DOI:

https://doi.org/10.21014/acta_imeko.v7i1.514

Abstract

This manuscript reports a study concerning the penetration of eddy currents in metallic non-ferromagnetic materials in the presence of linear sub-surface cracks. Simulations were performed for a set of different lengths and depths of the crack using a sinusoidal excitation current with uniform magnetic field distribution. The perturbed magnetic field components (Bx and Bz that occur due to the presence of cracks were obtained to understand the electromagnetic phenomena involved. The end and center of the crack were analyzed by the magnitude and the complex signature of the obtained magnetic field. The dependences between the length and depth of the crack and both magnetic field components were discussed.

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Published

2018-04-01

Issue

Vol. 7 No. 1 (2018)

Section

Research Papers

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