ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The authors developed a damage detection system that generates ultrasonic waves with apiezo-ceramic actuator and receives them by a fiber Bragg grating (FBG) sensor. In this research, thissystem was applied to evaluate debonding progress in CFRP skin/stringer bonded structures. FBGsensors were bonded on the stringer or embedded in the adhesive layer. Then, ultrasonic wave at300kHz was propagated through the debonded region, and the wavelet transform was applied to thereceived waveform. After that, a new damage index[removed info]and a correlation coefficient were calculated fromthe distribution of the wavelet transform coefficient. As a result, the damage index increased and thecorrelation coefficient decreased with an increase in the debonded area. Hence the length of thedebonding between the skin and the stringer could be well evaluated
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.1137.pdf
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