Title :
Experimental assessment of an ultrasonic band gap in a periodic two-dimensional composite
Author :
De Espinosa, F.R.M. ; Jimeniz, E. ; Torres, M.
Author_Institution :
Inst. de Acustica, CSIC, Madrid, Spain
Abstract :
An experimentally observed ultrasonic full band-gap in periodic two dimensional composites is described. The composite structure consists of an aluminum alloy plate with a square periodic arrangement of cylindrical holes filled with mercury. The band-gap found has a bandwidth of about 600 kHz around the first network resonance (750 kHz) along the [100] direction. The experimental test was performed by means of the through-transmission technique, exciting the structure with longitudinal waves. Moreover, different acoustic scannings of the vibration amplitude were also performed
Keywords :
acoustic resonance; aluminium; composite materials; energy gap; mercury (metal); ultrasonic propagation; ultrasonic transmission; 600 kHz; 750 kHz; Al-Hg; acoustic scanning; aluminum alloy plate; band-gap; bandwidth; composite structure; cylindrical holes; first network resonance; longitudinal waves; mercury; periodic two dimensional composites; periodic two-dimensional composite; square periodic arrangement; through-transmission technique; ultrasonic band gap; ultrasonic full band-gap; vibration amplitude; Acoustic propagation; Acoustic scattering; Aluminum alloys; Brillouin scattering; Lattices; Periodic structures; Photonic band gap; Photonic crystals; Resonance; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663078
