Defect characterisation in three dimensions by acoustic emission
- 14 September 1986
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 19 (9) , 1597-1612
- https://doi.org/10.1088/0022-3727/19/9/006
Abstract
A calibrated six-channel recording system has been used to detect, locate and characterise acoustic emission events associated with the growth of a fatigue crack in a compact tension specimen of 7010 aluminium alloy. The 3D force dipole representation of each event was deduced from the arrival strengths by inversion of the Green tensor. The principal strain components and the orientation relative to the specimen axes were then calculated. It was found that while all events contained dilatational and shear components, approximately 70% were in good agreement with mode I crack opening, while approximately 30% took the form of shear-like (slip) events. The significance of errors in the measurement and inversion procedures is discussed.Keywords
This publication has 7 references indexed in Scilit:
- Acoustic emission monitoring of fatigue in 7010 aluminium alloysMaterials Science and Technology, 1986
- Characterisation of fatigue crack extension by quantitative acoustic emissionInternational Journal of Fracture, 1985
- Acoustic emission due to nucleation of a microcrack in the proximity of a macrocrackJournal of Sound and Vibration, 1983
- An assessment of acoustic emission for nuclear pressure vessel monitoringProgress in Nuclear Energy, 1983
- An improved piezoelectric acoustic emission transducerThe Journal of the Acoustical Society of America, 1982
- Acoustic Emission From a Brief Crack Propagation EventJournal of Applied Mechanics, 1979
- Body force equivalents for seismic dislocationsBulletin of the Seismological Society of America, 1964