A new technique for the measurement of acoustic emission transients and their relationship to crack propagation
Open Access
- 1 December 1978
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 11 (17), 2359-2369
- https://doi.org/10.1088/0022-3727/11/17/007
Abstract
Describes a new broad-band approach to the detection of acoustic emission in which a capacitance transducer has been used to record the transient elastic waves generated by crack growth processes as surface displacements. A unique specimen geometry, the 'Yobell' has been developed to reduce interference from internal reflections of the ultrasonic pulse, so that the measured surface displacements can be compared with those calculated for a source buried below the surface of the half-space. A static source model has been used to relate the rise-time and amplitude of transients to the time-scales and magnitudes of incremental crack growth.Keywords
This publication has 11 references indexed in Scilit:
- Helium gas jet spectral calibration of acoustic emission transducers and systemsCanadian Journal of Physics, 1976
- A spectrum analysis of acoustic emissionNon-Destructive Testing, 1975
- Acoustic emission: some applications of Lamb’s problemThe Journal of the Acoustical Society of America, 1975
- Surface Displacements in an Elastic Half Space due to a Buried Moving Point SourceGeophysical Journal International, 1975
- Self-similar problems in elastodynmicsPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1973
- Acoustic emission measurements on reactor pressure vessel steelMaterials Science and Engineering, 1973
- The self-similar problem of the expanding elliptical crack in an anisotropic solidMathematical Proceedings of the Cambridge Philosophical Society, 1969
- Revised Grain-Scattering Formulas and TablesThe Journal of the Acoustical Society of America, 1965
- Motion of the Surface of a Uniform Elastic Half-Space Produced by a Buried PulseThe Journal of the Acoustical Society of America, 1957
- THE SEISMIC BURIED PULSEProceedings of the National Academy of Sciences, 1955