研究目的
To investigate the microstructural considerations on Love wave propagation in a double-layered structure consisting of a vertically heterogeneous viscoelastic layer and a piezoelectric layer overlying semi-infinite micropolar elastic substrate.
研究成果
The real and damping phase velocity profiles of Love waves are significantly affected by microstructural parameters, heterogeneity, internal friction, and piezoelectric properties. The findings can enhance the development of efficient Love wave-based devices in MEMS and NEMS.
研究不足
The study is theoretical and analytical, relying on idealized models; experimental validation is not provided. Assumptions include perfect bonding and specific material properties, which may not hold in real-world applications.
1：Experimental Design and Method Selection:
The study uses analytical methods to derive dispersion relations for Love waves in a layered structure with micropolar substrate, considering electrically open and short conditions. Theoretical models include micropolar elasticity and piezoelectric constitutive relations.
2：Sample Selection and Data Sources:
Material constants are taken from literature for aluminium-epoxy substrate, viscoelastic layer, and piezoelectric materials (PZT-5H and BaTiO3).
3：3).
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: No specific experimental equipment is mentioned; the study is theoretical with numerical computations.
4：Experimental Procedures and Operational Workflow:
The formulation involves solving wave equations and boundary conditions analytically, followed by numerical evaluation of dispersion relations.
5：Data Analysis Methods:
Numerical computations are performed to plot dispersion curves, analyzing effects of various parameters like coupling constant, characteristic length, heterogeneity, internal friction, and piezoelectric properties.
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