Abstract
Guided ultrasonic waves have shown great potential for structural health monitoring. Various types of transducer can be used for actuating and sensing of these waves. This includes non-contact approaches such as optical/laser techniques. Classical laser methods usually involve high energy interferometers. The paper demonstrates that a commercial laser vibrometer, designed for vibration/modal analysis, can be used for crack detection in metallic structures. The study involves a simple fatigue test in order to initiate and grow a crack. Lamb waves generated by one bonded piezoceramic transducer were sensed using a multi-point scanning laser vibrometer. The results demonstrate the potential of laser vibrometry for simple, rapid and robust detection of fatigue cracks in metallic structures.
| Translated title of the contribution | Structural health monitoring using scanning laser vibrometry: III. Lamb waves for fatigue crack detection |
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| Original language | English |
| Pages (from-to) | 1387 - 1395 |
| Number of pages | 9 |
| Journal | Smart Materials and Structures |
| Volume | 14(6) |
| DOIs | |
| Publication status | Published - Dec 2005 |