Titre :

Dispersion characteristics of guided waves in functionally graded anisotropic micro/nano-plates based on the modified couple stress theory

Auteur(s) :

Liu, Cancan [Auteur]
Yu, Jiangong [Auteur]
Xu, Wei Jiang [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Zhang, Xiaoming [Auteur]
Wang, Xianhui [Auteur]

Titre de la revue :

Thin-Walled Structures

Pagination :

107527

Éditeur :

Elsevier

Date de publication :

2021-04

ISSN :

0263-8231

Mot(s)-clé(s) en anglais :

Functionally graded material
Anisotropic small-scale structure
Legendre orthogonal polynomial
Dispersion curves
Couple stress theory

Discipline(s) HAL :

Sciences de l'ingénieur [physics]
Informatique [cs]
Physique [physics]

Résumé en anglais : [en]

In this paper, the acoustic wave motion characteristics of Lamb and SH waves in functionally graded (FG) anisotropic micro/nano-plates are studied based on the modified couple stress theory. A higher efficient computational ...
Lire la suite >In this paper, the acoustic wave motion characteristics of Lamb and SH waves in functionally graded (FG) anisotropic micro/nano-plates are studied based on the modified couple stress theory. A higher efficient computational approach, the extended Legendre orthogonal polynomial method (LOPM) is utilized to deduce solving process. This polynomial method does not need to solve the FG micro/nano-plates hierarchically, which provides a more realistic analysis model for FG micro/nano-plates and has high computational efficiency. Simultaneously, the solutions based on the global matrix method (GMM) are also deduced to verify the correctness of the polynomial method. Furthermore, the effects of size and material gradient are studied in detail. Numerical results show that the size effect causes wrinkles in Lamb wave dispersion curves, and the material gradient characteristic changes the amplitude and range of wrinkles. For SH waves, the length scale parameter L x increases the cutoff frequency but does not change the overall trend of the dispersion curve; on the contrary, L z does not change the cutoff frequency but causes the dispersion curve to show an upward trend.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL