Generation and Propagation of SH Waves Due to Shearing Stress Discontinuity in Linear Orthotropic Viscoelastic Layered Structure

2021 ◽  
Vol 7 (6) ◽  
Author(s):  
Abhishek Kumar Singh ◽  
Siddhartha Koley ◽  
Mriganka Shekhar Chaki
Keyword(s):  
Layered Structure ◽  
Shearing Stress ◽  
Sh Waves ◽  
Stress Discontinuity

Propagation of SH waves in an infinite/semi-infinite piezoelectric/piezomagnetic periodically layered structure

Ultrasonics ◽  
2016 ◽  
Vol 67 ◽  
pp. 120-128 ◽  
Author(s):  
Yu Pang ◽  
Yu-Shan Liu ◽  
Jin-Xi Liu ◽  
Wen-Jie Feng
Keyword(s):  
Layered Structure ◽  
Sh Waves

Analysis of generated shear wave due to stress discontinuity in a monoclinic layered structure

2021 ◽  
pp. 1-29
Author(s):  
Shalini Saha ◽  
Abhishek Kumar Singh ◽  
Mriganka Shekhar Chaki
Keyword(s):  
Shear Wave ◽  
Layered Structure ◽  
Stress Discontinuity

Propagation Behaviors of SH Waves in Piezoelectric Layer/Elastic Cylinder with an Imperfect Interface

2012 ◽  
Vol 151 ◽  
pp. 130-134 ◽  
Author(s):  
Yan Hong Wang ◽  
Mei Li Wang ◽  
Jin Xi Liu
Keyword(s):  
Dispersion Equation ◽  
Layered Structure ◽  
Material Properties ◽  
Piezoelectric Layer ◽  
Elastic Cylinder ◽  
Imperfect Interface ◽  
Interface Conditions ◽  
Sh Waves ◽  
Numerical Examples ◽  
Basic Equations

The dispersion behaviors of SH waves are investigated propagating in a layered structure consisting of a piezoelectric layer and an elastic cylinder. The interface between the piezoelectric layer and the elastic cylinder is assumed to be imperfect bonding. The surface of the piezoelectric layer is assumed to be mechanically free and electrically shorted. The dispersion equation is derived by the basic equations, the boundary and the interface conditions. The numerical examples are provided to show the influences of the imperfect interface, the thickness ratios and the material properties of the piezoelectric on the dispersive characteristics.

In situ TEM Studies of agglomeration of sub-nanometer Ru layers in Ru/C multilayers

1992 ◽  
Vol 50 (1) ◽  
pp. 256-257
Author(s):  
Tai D. Nguyen ◽  
Ronald Gronsky ◽  
Jeffrey B. Kortright
Keyword(s):  
Layered Structure ◽  
Driving Force ◽  
High Energy ◽  
Superior Performance ◽  
In Situ Tem ◽  
Rayleigh Instability ◽  
Practical Applications ◽  
Transmission Electron ◽  
Diffraction Patterns

Nanometer period Ru/C multilayers are one of the prime candidates for normal incident reflecting mirrors at wavelengths < 10 nm. Superior performance, which requires uniform layers and smooth interfaces, and high stability of the layered structure under thermal loadings are some of the demands in practical applications. Previous studies however show that the Ru layers in the 2 nm period Ru/C multilayer agglomerate upon moderate annealing, and the layered structure is no longer retained. This agglomeration and crystallization of the Ru layers upon annealing to form almost spherical crystallites is a result of the reduction of surface or interfacial energy from die amorphous high energy non-equilibrium state of the as-prepared sample dirough diffusive arrangements of the atoms. Proposed models for mechanism of thin film agglomeration include one analogous to Rayleigh instability, and grain boundary grooving in polycrystalline films. These models however are not necessarily appropriate to explain for the agglomeration in the sub-nanometer amorphous Ru layers in Ru/C multilayers. The Ru-C phase diagram shows a wide miscible gap, which indicates the preference of phase separation between these two materials and provides an additional driving force for agglomeration. In this paper, we study the evolution of the microstructures and layered structure via in-situ Transmission Electron Microscopy (TEM), and attempt to determine the order of occurence of agglomeration and crystallization in the Ru layers by observing the diffraction patterns.

PROPAGATION OF SH-WAVES IN AN INITIALLY STRESSED ANISOTROPIC MAGNETOELASTIC LAYERED MEDIA

2020 ◽  
Vol 11 (1) ◽  
pp. 1-14
Author(s):  
Santosh Kumar ◽  
M. M. Billa ◽  
A. Govindarajan ◽  
B. K. Mandal
Keyword(s):  
Layered Media ◽  
Sh Waves
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