Love-type waves in functionally graded piezoelectric material (FGPM) sandwiched between initially stressed layer and elastic substrate

This paper investigates the propagation behavior of Love-type surface waves in three-layered composite structure with initial stress. The composite structure has been taken in such a way that a functionally graded piezoelectric material (FGPM) layer is bonded between initially stressed piezoelectric...

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Bibliographic Details
Published in:Waves in random and complex media 2015-10, Vol.25 (4), p.608-627
Main Authors: Saroj, Pradeep K., Sahu, S.A., Chaudhary, S., Chattopadhyay, A.
Format: Article
Language:English
Subjects:
Composite materials
Composite structures
Dependence
Free surfaces
Functionally gradient materials
Graphical representations
Initial stresses
Laminates
Mathematical analysis
Multilayers
Phase velocity
Piezoelectricity
Stress propagation
Substrates
Surface waves
Wave dispersion
Wave propagation
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Summary:This paper investigates the propagation behavior of Love-type surface waves in three-layered composite structure with initial stress. The composite structure has been taken in such a way that a functionally graded piezoelectric material (FGPM) layer is bonded between initially stressed piezoelectric upper layer and an elastic substrate. Using the method of separation of variables, frequency equation for the considered wave has been established in the form of determinant for electrical open and short cases on free surface. The bisection method iteration technique has been used to find the roots of the dispersion relations which give the modes for electrical open and short cases. The effects of gradient variation of material constant and initial stress on the phase velocity of surface waves are discussed. Dependence of thickness on each parameter of the study has been shown explicitly. Study has been also done to show the existence of cut-off frequency. Graphical representation has been done to exhibit the findings. The obtained results are significant for the investigation and characterization of Love-type waves in FGPM-layered media.
ISSN:1745-5030
1745-5049
DOI:10.1080/17455030.2015.1063738