Abstract： The influence of localized resonance on the properties of band-gaps of the two-dimensional periodic composite are analysed numerically and experimentally by comparing the two-component phononic crystal with the three-component one. The three-component composite which exhibits localized resonance in the elastically soft coating ring is composed of a square array of coated cylinders embedded in an epoxy resin. The coated cylinders consist of a steel inner core and rubber coating, which has much smaller wave velocity and mass density than the matrix and the inner material. The measured transmission power of the three-component composite drops to the noise level in a broad ultrasonic frequency interval by contrast to the binary composite, which is in good agreement with the calculation using the finite element method.
(Reflection, refraction, diffraction, interference, and scattering of elastic and poroelastic waves)
引用本文:
ZHANG Shu;HUA Jia;CHENG Jian-Chun. Experimental and Theoretical Evidence for the Existence of Broad Forbidden Gaps in the Three-Component Composite[J]. 中国物理快报, 2003, 20(8): 1303-1305.
ZHANG Shu, HUA Jia, CHENG Jian-Chun. Experimental and Theoretical Evidence for the Existence of Broad Forbidden Gaps in the Three-Component Composite. Chin. Phys. Lett., 2003, 20(8): 1303-1305.
2003, Vol. 20 
