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Complete Band Gaps for Lamb Waves in Cubic Thin Plates with Periodically Placed Inclusions |
| CHEN Jiu-Jiu;QIN Bo;CHENG Jian-Chun |
| State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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CHEN Jiu-Jiu, QIN Bo, CHENG Jian-Chun 2005 Chin. Phys. Lett. 22 1706-1708 |
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Abstract We present a theoretical study for propagation of Lamb waves in cubic thin plates consisting of solid inclusions placed periodically in the host material. The dispersion curves of Lamb waves propagating parallel to the surfaces of the plates are calculated based on the plane wave expansion method for triangular lattices. We realize the existence of full band gaps in the systems composed of W cylinders embedded in a Si matrix with filling ratio f=0.176 for different thickness ratios of h/a, where h is the plate thickness and a is the lattice spacing.
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| Keywords:
43.35.Cg
43.20.Gp
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Published: 01 July 2005
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| PACS: |
43.35.Cg
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(Ultrasonic velocity, dispersion, scattering, diffraction, and Attenuation in solids; elastic constants)
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43.20.Gp
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(Reflection, refraction, diffraction, interference, and scattering of elastic and poroelastic waves)
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