Nonlinear Acoustoelastic Interactions of Lamb Waves with LiNbO3 Films Deposited on Sapphire Substrates

H. Liu; K.C. Shin; J.J. Lee; Z.M. Cai

doi:10.4028/www.scientific.net/KEM.261-263.263

Paper Titles

Numerical Simulations of Failure of Brittle Solids under Dynamic Impact Using a New Computer Program - DIFAR
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The Effect of the Incidence Direction of Stress Wave on Cracks
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Influence of Imperfect Interface on the Propagation of Love Waves in Piezoelectric Layered Structures
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Transient Anti-Plane Crack Problem in a Functionally Graded Smart Structure
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Nonlinear Acoustoelastic Interactions of Lamb Waves with LiNbO₃ Films Deposited on Sapphire Substrates
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Development of a Material Constitutive for High-Rate Using a Combined Experiment/Computation Method
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Study on the Mechanical Properties of Soft Rock under Dynamic Uniaxial Compression
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Analysis of Low-Velocity Impact on Composite Sandwich Panels Using an Assumed Strain Solid Element
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Damage Assessment of Composite Structures Subjected to Low Velocity Impact
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Nonlinear Acoustoelastic Interactions of Lamb Waves with LiNbO₃ Films Deposited on Sapphire Substrates

Abstract:

The influence of a biasing electric field on the propagation of the lowest-order antisymmetrical a0 Lamb wave modes in a bi-layered piezoelectric plate is investigated in this paper. It is found that the velocity shifts for the a0 mode due to presence of the bias field on the 10- µm LiNbO3 film structure are comparable with those observed in surface acoustic waves and Lamb waves in LiNbO3 plates. The fractional change in phase velocity of the layered piezoelectric structure is a linear function of the biasing electric field and can be used in voltage sensors.