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Ultrasonic resonance in thin two-layer dynamic systems
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UNSPECIFIED (2006) Ultrasonic resonance in thin two-layer dynamic systems. In: 32nd Annual Review of Process in Quantitative Nondestructive Evaluation, Brunswick, ME, JUL 31-AUG 05, 2005. Published in: Review of Progress in Quantitative Nondestructive Evaluation, Vols 25A and 25B, 820 pp. 1111-1118. ISBN 0-7354-0312-0. ISSN 0094-243X.
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Abstract
Ultrasonic measurement of polymer cure has been demonstrated to be a method that can provide material property information for coatings or bonding applications. Often the polymer thickness required in real applications is significantly less than typical ultrasonic wavelengths that may be practically available. The cure behaviour of thin layers will be different to thicker samples as the cross-linking reaction is usually exothermic and strongly influenced by heat flow in the system. By applying a thin layer of polymer in the thickness range 10-100 mu m to an aluminium substrate with thickness of approximately 1mm we are able to monitor the effects of adhesive cure on the resonant modes of this two layer system. We describe a simple model that does not take into account ultrasonic attenuation and then an improvement to this model that does take into account ultrasonic attenuation in the polymer through viscoelastic behaviour. Experimental results show good correlation with the models and help to explain the complicated behaviour observed even when using the simpler model without attenuation. The potential to extract the ultrasonic properties of the polymer layer from these measurements is discussed.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Series Name: | AIP CONFERENCE PROCEEDINGS | ||||
Journal or Publication Title: | Review of Progress in Quantitative Nondestructive Evaluation, Vols 25A and 25B | ||||
Publisher: | AMER INST PHYSICS | ||||
ISBN: | 0-7354-0312-0 | ||||
ISSN: | 0094-243X | ||||
Editor: | Thompson, DO and Chimenti, DE | ||||
Official Date: | 2006 | ||||
Dates: |
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Volume: | 820 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 1111-1118 | ||||
Publication Status: | Published | ||||
Title of Event: | 32nd Annual Review of Process in Quantitative Nondestructive Evaluation | ||||
Location of Event: | Brunswick, ME | ||||
Date(s) of Event: | JUL 31-AUG 05, 2005 |
Data sourced from Thomson Reuters' Web of Knowledge
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