A refined size-dependent couple stress theory for laminated composite micro-plates using isogeometric analysis

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Cuong-Le Thanh (Author) Other; A. J. M. Ferreira (Author) FEUP; Magd Abdel Wahab (Author) Other

Journal

Title: Thin-Walled Structures

Vol. 145

Pages: 1-21

ISSN: 0263-8231

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 40 Citations

Other information

Authenticus ID: P-00R-531

DOI: 10.1016/j.tws.2019.106427

Abstract (EN): In this article, a refined modified couple stress theory based on isogeomeric analysis to capture the small-scale effect on laminated composite micro-plates is developed for the first time. Based on Hamilton's principle, the weak form for composite plate is established by using the Reddy's third order shear deformation theory without shear correction factor and the refined modified couple stress theory. Unlike the modified couple stress theory, which contains only one material length scale parameter, the proposed theory contains three material length scale parameters. To confirm the accuracy of the proposed method, several examples are presented, discussed and compared to references' solutions. In addition, cut-out complicated shapes are analyzed to show the influences of the small-scale effect on free vibration behaviors of laminated micro-plates. An increase in the material length scale parameter leads to decrease in the deflection, stresses and increase in frequencies and critical buckling load factor. The presented numerical results show the great efficiency of the NURBS-based isogeometric analysis for capturing the small-scale effect of the composite laminated micro-plates.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 21