Title :
Lifetime of localized and extended modes in complex composite structures
Author :
Alippi, A. ; Bettucci, A. ; Craciun, F. ; Farrelly, F. ; Petri, A. ; Wright, O.B.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
We have measured the lifetime of extended and localized modes electrically excited in periodic and self-similar composite piezoelectric plates. Using two different experimental methods, electrical measurement of the vibrational frequency spectrum and heterodyne optical probing of surface vibration in the time domain, evidence was found that the localized modes have on average a longer lifetime than the extended modes
Keywords :
composite materials; localised modes; piezoelectric materials; vibrational modes; complex composite structures; electrical measurement; extended modes; heterodyne optical probing; localized modes; mode lifetime; piezoelectric plates; surface vibration; time domain; vibrational frequency spectrum; Piezoelectric materials/devices;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401756
