Referenced Items are not available for this document.
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
Published in:
Ultrasonics Symposium, 2001 IEEE
(Volume:1
)
Date of Conference: 2001
- Page(s):
- 751 - 754 vol.1
- Meeting Date :
- 07 Oct 2001-10 Oct 2001
- Print ISBN:
- 0-7803-7177-1
- INSPEC Accession Number:
- 7294748
- Conference Location :
- Atlanta, GA
- Digital Object Identifier :
- 10.1109/ULTSYM.2001.991833
- Product Type:
- Conference Publications
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