Journal of acoustic emission 

About: Journal of acoustic emission is an academic journal. The journal publishes majorly in the area(s): Acoustic emission & Lamb waves. It has an ISSN identifier of 0730-0050. Over the lifetime, 302 publications have been published receiving 3332 citations.

Acoustic emission, principles and instrumentation

Abstract: This is a tutorial article. It first covers the general physical principles encountered in the field of acoustic emission. It then discusses different types of instrumentation and signal analysis techniques used with single channel acoustic emission tests.

AE Source Orientation by Plate Wave Analysis

Abstract: Lead breaks (Hsu-Neilsen source) were used to generate simulated acoustic emission signals in an aluminum plate at angles of 0, 30, 60, and 90 degrees with respect to the plane of the plate. This was accomplished by breaking the lead on slots cut into the plate at the respective angles. The out-of-plane and in-plane displacement components of the resulting signals were detected by broad band transducers and digitized. Analysis of the waveforms showed them to consist of the extensional and flexural plate modes. The amplitude of both components of the two modes was dependent on the source orientation angle. This suggests that plate wave analysis may be used to determine the source orientation of acoustic emission sources.

Wavelet transform of acoustic emission signals

Abstract: Wavelet transform (WT) allows the determination of frequency spectrum as a function of time using short waveform segments or wavelets as the basis functions. Resultant mapping of wavelet coefficients in the frequency-time coordinate plane provides more informative characterization of acoustic emission (AE) signals than the power-density spectra from usual Fourier transform. A short tutorial on WT is included. A program for performing WT procedure has been developed and is given as Appendix. As an example, wavelet transform was performed on AE signals from a longitudinal glass-fiber reinforced composite sample under tensile loading. Obtained spectrograms were classified into four types and correlated to the fracture dynamics separately determined by radiation pattern and source simulation analyses. WT is demonstrated to be a powerful new analysis method in evaluating AE signals.

Acoustic emission produced by deformation of metals and alloys

Abstract: Acoustic emission is frequently produced during deformation of metals and alloys. Numerous mechanisms can be responsible for the acoustic emission activity. This report is a comprehensive review of the literature concerning acoustic emission produced during deformation by dislocation motion, deformation twinning, as well as inclusion fracture and decohesion. 232 refs., 30 figs.