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1 Journal of Theoretical and Applied Mechanics

1 2015

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Effects of liquid loadings on lamb waves in context of size dependent couple stress theory

Sharma V., Kumar S.

Journal of Theoretical and Applied Mechanics

2015

Vol. 53 nr 4

925—934

For understanding the effects of an internal microstructure, generalised microcontinuum theories with additional microstructural parameters are developed. One such a parameter, called the characteristic length of the material comparable with the internal cell size of the material is involved in the couple stress theory. The problem of propagation of Lamb waves in a plate with an internal microstructure and loaded with an inviscid liquid on both sides is studied using the couple stress theory. The dispersion equation of Lamb waves with the liquid loadings is derived. The impact of the liquid loadings is studied on the propagation of Lamb waves. The effect of the characteristic length is also studied on the phase velocity of Lamb waves in the plate for various modes in the presence of liquid loadings.