MONITORING FATIGUE CRACKS IN ALUMINUM JOINTS WITH ULTRASONIC GUIDED WAVES.

Authors :: Cho, H.
Lissenden, C. J.
Source :: AIP Conference Proceedings. 6/23/2011, Vol. 1335 Issue 1, p145-152. 8p. 2 Black and White Photographs, 2 Diagrams, 4 Graphs.
Publication Year :: 2011
Abstract: Experiments are conducted on aluminum plates containing fastener holes as well as aluminum plates containing a bolted joint. Cyclic mechanical loading is interrupted to perform structural health monitoring with the S0 fundamental Lamb wave mode. An array of surface bonded piezoelectric disk transducers having a pair of transducers at each of five bolt holes is employed. A correlation between the transmission coefficient and crack size is suggested by the data. [ABSTRACT FROM AUTHOR]