Qian Chen

Publications (2)3.89 Total impact

• Article: Band gaps of lamb waves in one-dimensional piezoelectric composite plates: effect of substrate and boundary conditions.

  Xin-Ye Zou, Bin Liang, Qian Chen, Jian-Chun Cheng
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  ABSTRACT: We theoretically study the band structures of Lamb waves in one-dimensional phononic crystal plates consisting of piezoelectric ceramics placed periodically in epoxy with epoxy or piezoelectric ceramic substrate by the virtual plane wave expansion method. The dependences of the widths and starting frequencies of first band gaps (FBG) on the substrate's thickness, the filling fraction, and the lattice spacing are calculated for different materials of substrate under different electric boundary conditions, i.e., short circuit (SC) and open circuit (OC). The FBG width decreases gradually as the substrate's thickness increases and the FBG starting frequency increases progressively as the thickness increases on the whole. The FBG widths and starting frequencies with SC are always larger than with OC. Our research shows that it is possible to control the width and starting frequency of the FBG in the engineering according to need by choosing suitable values of the substrate's thickness, the filling fraction, and the lattice spacing.
  IEEE transactions on ultrasonics, ferroelectrics, and frequency control 03/2009; 56(2):361-7. · 1.80 Impact Factor
• Article: Control of the elastic wave bandgaps in two-dimensional piezoelectric periodic structures

  Xin-Ye Zou, Qian Chen, Bin Liang, Jian-Chun Cheng
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  ABSTRACT: Theoretical studies are presented for the band structures of bulk waves in a two-dimensional composite structure consisting of rectangular piezoelectric ceramics placed periodically in an epoxy substrate. The dependences of the widths and starting frequencies of the first bandgaps (FBGs) on the filling fraction and the ratio of length to width of the embedded section are calculated for different polarized directions of the piezoelectric ceramics and different phononic structures. Our research shows that the FBG depend strongly on the polarized directions, the phononic structures, the filling fraction and the ratio of length to width, respectively. Therefore, one can control the FBG in engineering according to need by choosing these parameters of the system.
  Smart Materials and Structures 11/2007; 17(1):015008. · 2.09 Impact Factor