A laser-generated standard acoustic emission source
Abstract
A standard simulated source of acoustic emission is proposed, using a pulsed laser. It is found that the thermoelastic source generated by the absorption of radiation from a Q-switched Nd:YAG laser pulse has similar characteristics to a microcrack emission source of specified orientation. It reproduces the dipolar stress field, the time duration, and the amplitude of a typical emission event. An example of the use of the source to determine the amplitude and frequency calibration of acoustic emission equipment is reported.
- Publication:
-
Materials Evaluation
- Pub Date:
- December 1981
- Bibcode:
- 1981MatEv..39.1250S
- Keywords:
-
- Acoustic Emission;
- Laser Applications;
- Microcracks;
- Sound Generators;
- Thermoelasticity;
- Crack Propagation;
- Neodymium Lasers;
- Nondestructive Tests;
- Q Switched Lasers;
- Stress Distribution;
- Wave Propagation;
- Yag Lasers;
- Lasers and Masers