Abstract
Ultrasonic evaluation of materials using a non-contact system is sometimes desirable, for example when the material is moving too quickly to allow conventional fluid couplants to be used, is contained in a hostile environment, or the material itself is absorbent or toxic. In such situations, a pulsed laser is ideal for generating a variety of ultrasonic transients [1], as longitudinal, shear, surface (Rayleigh) waves and plate (Lamb) waves are generated simultaneously. Several types of non-contact detector are also available, including various optical devices [2] such as interferometers and beam deflectors. The disadvantages of an entirely laser based system are cost, and the optical quality of the test material must be reasonably high.
Original language | English |
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Title of host publication | Review of Progress in Quantitative Nondestructive Evaluation |
Editors | Donald O. Thompson, Dale E. Chimenti |
Publisher | Springer |
Pages | 1333-1340 |
Number of pages | 8 |
Volume | 14 |
ISBN (Print) | 9781461358190 |
DOIs | |
Publication status | Published - 1995 |
Keywords
- evaluation
- fiber-reinforced
- composites
- noncontact
- laser
- air
- transducer