Comparative study of micro-scale size effects on mechanical coupling factors and SH-wave propagation in functionally graded piezoelectric/piezomagnetic structures

2020 ◽  
pp. 1-36
Author(s):  
Vanita Sharma ◽  
Satish Kumar
Keyword(s):  
Wave Propagation ◽  
Comparative Study ◽  
Size Effects ◽  
Functionally Graded ◽  
Sh Wave ◽  
Mechanical Coupling ◽  
Micro Scale ◽  
Scale Size ◽  
Coupling Factors ◽  
Functionally Graded Piezoelectric

Viscoelastic Circumferential SH Wave in Graded Hollow Cylinders

2014 ◽  
Vol 543-547 ◽  
pp. 7-11
Author(s):  
X.D. Yang ◽  
J.G. Yu
Keyword(s):  
Wave Propagation ◽  
Nondestructive Evaluation ◽  
Functionally Graded Material ◽  
Functionally Graded ◽  
Polynomial Method ◽  
Sh Wave ◽  
Graded Material ◽  
Viscoelastic Theory ◽  
Hollow Cylinders ◽  
Dispersion And Attenuation

In this article, circumferential SH wave propagation in functionally graded material (FGM) hollow cylinders is investigated. Based on the Kelvin-Voigt viscoelastic theory, the controlling differential equations in terms of displacements are deduced. By the Legendre polynomial method, the asymptotic solutions are obtained. Through the numerical results, the influences of gradient profile and the influences of the radius to thickness ratio on dispersion and attenuation are illustrated. The work is crucial for guided ultrasonic nondestructive evaluation for graded hollow cylinders.

Atoms to Assemblies: A Physics-Based Hierarchical Modelling Approach for Polymer Composite Components

2014 ◽  
Vol 553 ◽  
pp. 41-47
Author(s):  
Garth M. Pearce ◽  
Shen Hin Lim ◽  
Jung Hoon Sul ◽  
B. Gangadhara Prusty ◽  
Don W. Kelly
Keyword(s):  
Size Effects ◽  
Epoxy Composites ◽  
Macroscopic Scale ◽  
Materials Development ◽  
Micro Scale ◽  
Polymer Resin ◽  
Hierarchical Modelling ◽  
Scale Size ◽  
Hierarchical Nature ◽  
Modelling Approach

The development of new composite materials requires analysis and experimentation spanning scales from nanometres to metres, from “atoms to assemblies”. In this paper, concerned primarily with fibre reinforced epoxy composites, a methodology is presented which allows continuum level structural simulation to account for nanoand micro-scale size effects in composites. The novelty of this approach is the modular hierarchical nature of the simulation which ensures computational tractability, regardless of the length scales considered. Linking the nanoscale to the macroscopic scale in a single simulation allows for holistic materials development, including the addition of nanoadditives to polymer resin systems.

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