Abstract
Characterization of disbonds in a nuclear radiation protection structure (NRPS) has been investigated by laser ultrasonics. Characteristics of laser ultrasonic waves in an NRPS have been researched by simulations and experiments. The signal-to-noise ratio of laser ultrasonic signals in the adhesive structure can be improved by wavelet threshold de-noising (WTDN) and band-pass filtering. Original laser ultrasonic signals were processed by WTDN to implement C-scans which have high contrast to noise ratio. Laser ultrasonic C-scan results can accurately characterize the disbonds, which are in reasonable agreement with the immersion ultrasonic detection result. Therefore, laser ultrasonics has potential for non-destructive evaluation of the bonding quality of NRPSs.
| Original language | English |
|---|---|
| Pages (from-to) | 1264-1278 |
| Number of pages | 15 |
| Journal | Journal of Adhesion Science and Technology |
| Volume | 31 |
| Issue number | 11 |
| DOIs | |
| State | Published - 3 Jun 2017 |
Keywords
- Laser ultrasonics
- disbond
- non-destructive evaluation
- wavelet threshold de-noising
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