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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Cerniglia, D. Djordjevic, B.B. Nigrelli, V. |
| Copyright Year | 2001 |
| Description | Author affiliation: Dept. of Mech. & Aeronaut., Palermo Univ., Italy (Cerniglia, D.) |
| Abstract | The results of an experimental study conducted to detect subsurface defects in a thick Gr/PPS composite test sample using a noncontact ultrasonic system are presented. Surface waves are generated by a pulsed laser and detected by an air-coupled capacitance transducer. By controlling the surface wave wavelength through a shadow mask, it is possible to control surface wave penetration depth in the sample. Surface wave peak-to-peak amplitude is related to the near-surface material condition. Results indicate that signal amplitude decreases as the width of the defect increases and an approximately linear relation can be deduced. |
| Sponsorship | Ultrasonics, Ferroelectr., & Frequency Control Soc |
| Starting Page | 751 |
| Ending Page | 754 |
| File Size | 68581 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780371771 |
| DOI | 10.1109/ULTSYM.2001.991833 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2001-10-07 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Composite materials Surface waves Optical pulse generation Surface acoustic waves Surface emitting lasers Ultrasonic transducers Acoustic transducers Nondestructive testing Capacitance Aerospace materials |
| Content Type | Text |
| Resource Type | Article |
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