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Modeling of Buried Monopole and Dipole Sources of Acoustic Emission With a Finite Element Technique

Published

Author(s)

Marvin A. Hamstad, Agnes O'Gallagher, John M. Gary

Abstract

The requirements for dynamic finite element modeling of the source dynamics and wave propagation of buried acoustic emission point sources were examined. Maximum permissible source and cell sizes for point sources were determined as a function of the minimum wavelength for frequencies of interest. These wavelengths were calculated from the source rise times. For both buried monopoles and dipoles, finite element predictions for both plates and half-spaces were compared with published results obtained using other approaches. The modeled signals were evaluated from the epicenter to a distance of 15 plate thickness for plates with a thickness of {less then or equal to} 25 mm. The finite element method provided accurate results and a practical means to analyze finite specimens, unlike most alternate approaches.
Citation
Journal of Acoustic Emission
Volume
17
Issue
No. 3/4

Keywords

acoustic emission, buried sources, finite element models

Citation

Hamstad, M. , O'Gallagher, A. and Gary, J. (1999), Modeling of Buried Monopole and Dipole Sources of Acoustic Emission With a Finite Element Technique, Journal of Acoustic Emission (Accessed February 25, 2024)
Created December 1, 1999, Updated February 17, 2017