Effects of varying anisotropy coefficient on SH-wave dispersion

1970 ◽  
Vol 60 (6) ◽  
pp. 2071-2081
Author(s):  
S. K. Upadhyay ◽  
Janardan G. Negi
Keyword(s):  
Wave Propagation ◽  
Numerical Analysis ◽  
Layered Structure ◽  
Matrix Method ◽  
Characteristic Frequency ◽  
Wave Dispersion ◽  
Frequency Equation ◽  
Anisotropy Coefficient ◽  
Sh Wave

Abstract The characteristic frequency equation for SH-wave propagation in an anisotropic, inhomogeneous-layered structure lying between two isotropic, homogeneous half-spaces is obtained by applying the Thomson-Haskell matrix method. A particular case is studied to analyze the effects of varying anisotropy on SH-wave dispersion. Numerical analysis is performed for a representative set of data to distinguish between the cases of increasing, uniform, and decreasing anisotropy coefficien in the medium.

Effect of anisotropy on Love wave propagation

1968 ◽  
Vol 58 (1) ◽  
pp. 259-266
Author(s):  
Janardan G. Negi ◽  
S. K. Upadhyay
Keyword(s):  
Wave Propagation ◽  
Frequency Dependence ◽  
Characteristic Frequency ◽  
Love Wave ◽  
Transversely Isotropic ◽  
Frequency Equation ◽  
Isotropic Case ◽  
Rigid Base ◽  
Isotropic Layer ◽  
Transversely Isotropic Layer

abstract A study on Love wave propagation in a transversely isotropic layer with stress free upper surface and underlying rigid base, is presented. The characteristic frequency equation is obtained and frequency dependence of the velocity parameters for different modes is analysed in detail. Several distinctive propagation phenomena which differ considerably from those in isotropic case are listed below:

Modeling of SH-Wave Propagation in a Pre-stressed Highly Anisotropic Layered Structure

2018 ◽  
Vol 51 (4) ◽  
pp. 419-436 ◽  
Author(s):  
Sanjeev A. Sahu ◽  
Kamlesh K. Pankaj ◽  
Shreeta Kumari
Keyword(s):  
Wave Propagation ◽  
Layered Structure ◽  
Sh Wave

SH wave propagation in a periodic cement-based piezoelectric layered barrier

2021 ◽  
pp. 1-9
Author(s):  
Haozhe Jiang ◽  
Zhanhua Cai ◽  
Lili Yuan ◽  
Tingfeng Ma ◽  
Jianke Du ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Sh Wave

On wave dispersion characteristics of fluid-conveying smart nanotubes considering surface elasticity and flexoelectricity approach

2020 ◽  
pp. 095440622096561
Author(s):  
Amir-Reza Asghari Ardalani ◽  
Ahad Amiri ◽  
Roohollah Talebitooti ◽  
Mir Saeed Safizadeh
Keyword(s):  
Wave Propagation ◽  
Strain Gradient ◽  
Surface Elasticity ◽  
Shear Deformation Theory ◽  
Wave Dispersion ◽  
Strain Gradient Theory ◽  
Wave Number ◽  
Gradient Theory ◽  
Specific Domain ◽  
Size Dependent

Wave dispersion response of a fluid-carrying piezoelectric nanotube is studied in this paper utilizing an improved model for piezoelectric materials which capture a new effect known as flexoelectricity in conjunction with the surface elasticity. For this aim, a higher order shear deformation theory is employed to model the problem. Furthermore, strain gradient effect as well as nonlocal effect is taken into consideration throughout using the nonlocal strain gradient theory (NSGT). Surface elasticity is also considered to make an accurate size-dependent formulation. Additionally, a non-compressible and non-viscous fluid is taken into consideration to model the flow effect. The wave propagation solution is then implemented to the governing equations obtained by Hamiltonian’s approach. The phase velocity and group velocity of the nanotube is determined for three wave modes (i.e. shear, longitudinal and bending waves) to study the influence of various involved factors including strain gradient, nonlocality, flexoelectricity and surface elasticity and flow velocity on the wave dispersion curves. Results reveal a considerable effect of the flexoelectric phenomenon on the wave propagation properties especially at a specific domain of the wave number. The size-dependency of this effect is disclosed. Overall, it is found that the flexoelectricity exhibits a substantial influence on wave dispersion properties of the smart fluid-conveying systems. Hence, such size-dependent effect should be considered to achieve exact and accurate knowledge on wave propagation characteristics of the system.

Effect of interlayer on stress wave propagation in CMC/RHA multi-layered structure

2010 ◽  
Vol 70 (12) ◽  
pp. 1669-1673 ◽  
Author(s):  
Yangwei Wang ◽  
Fuchi Wang ◽  
Xiaodong Yu ◽  
Zhuang Ma ◽  
Jubin Gao ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Stress Wave ◽  
Layered Structure ◽  
Stress Wave Propagation

Analytical study on shear wave propagation in anisotropic dry sandy spherical layered structure

2021 ◽  
Author(s):  
Pulkit Kumar ◽  
Moumita Mahanty ◽  
Abhishek Kumar Singh ◽  
Amares Chattopadhyay
Keyword(s):  
Wave Propagation ◽  
Shear Wave ◽  
Layered Structure ◽  
Analytical Study
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