Publication detail

Acoustic and electromagnetic emission as a tool for crack localization

Sedlak, P., Sikula, J., Lokajicek T., Mori Y.

Original Title

Acoustic and electromagnetic emission as a tool for crack localization

English Title

Acoustic and electromagnetic emission as a tool for crack localization

Type

journal article

Language

en

Original Abstract

The creation of cracks is accompanied by electric charge redistribution due to loosened chemical bounds. Electric charge on a crack wall creates dipole moments. Vibrations of crack walls produce time-dependent dipole moments and, consequently, electric and magnetic fields are generated. An electric signal is induced on metal electrodes. Simultaneously with the electromagnetic emission (EME) signal, an acoustic emission (AE) signal is generated, but due to the different velocities of propagation of both waves, the detection of the AE signal is delayed. This time delay presents the time of the wave propagation from the individual acoustic emission sensor to the crack. The defect can be located by means of these time intervals. This paper describes the localization using acoustic and electromagnetic emission signals for the two-dimensional case.

English abstract

The creation of cracks is accompanied by electric charge redistribution due to loosened chemical bounds. Electric charge on a crack wall creates dipole moments. Vibrations of crack walls produce time-dependent dipole moments and, consequently, electric and magnetic fields are generated. An electric signal is induced on metal electrodes. Simultaneously with the electromagnetic emission (EME) signal, an acoustic emission (AE) signal is generated, but due to the different velocities of propagation of both waves, the detection of the AE signal is delayed. This time delay presents the time of the wave propagation from the individual acoustic emission sensor to the crack. The defect can be located by means of these time intervals. This paper describes the localization using acoustic and electromagnetic emission signals for the two-dimensional case.

Keywords

acoustic emission, electromagnetic emission, cracks, localization

RIV year

2008

Released

07.02.2008

Publisher

IOP Publishing

Location

online doi: 10.1088/0957-0233/19/4/045701

Pages to

045701

Pages count

7

URL

BibTex


@article{BUT48946,
  author="Petr {Sedlák} and Josef {Šikula} and Tomáš {Lokajíček} and Yasuhiko {Mori}",
  title="Acoustic and electromagnetic emission as a tool for crack localization",
  annote="The creation of cracks is accompanied by electric charge redistribution due to loosened chemical bounds. Electric charge on a crack wall creates dipole moments. Vibrations of crack walls produce time-dependent dipole moments and, consequently, electric and magnetic fields are generated. An electric signal is induced on metal electrodes. Simultaneously with the electromagnetic emission (EME) signal, an acoustic emission (AE) signal is generated, but due to the different velocities of propagation of both waves, the detection of the AE signal is delayed. This time delay presents the time of the wave propagation from the individual acoustic emission sensor to the crack. The defect can be located by means of these time intervals. This paper describes the localization using acoustic and electromagnetic emission signals for the two-dimensional case.",
  address="IOP Publishing",
  chapter="48946",
  institution="IOP Publishing",
  journal="Measurement Science and Technology",
  number="4",
  volume="19",
  year="2008",
  month="february",
  pages="0--045701",
  publisher="IOP Publishing",
  type="journal article"
}