Natural modes of vibration of variable stiffness composite laminates with curvilinear fibers

• Type: Article in International Scientific Journal
• Date: 2011

Authors

H. Akhavan (Author) Other; P. Ribeiro (Author) FEUP

Journal

Title: Composite Structures

Vol. 93

Pages: 3040-3047

ISSN: 0263-8223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 81 Citations

ISI Web of Science

Scopus - 164 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

CORDIS: Technological sciences > Engineering > Mechanical engineering > Vibration engineering

Other information

Authenticus ID: P-002-MC2

DOI: 10.1016/j.compstruct.2011.04.027

Abstract (EN): In this paper, natural frequencies and vibrational mode shapes of variable stiffness composite laminate (VSCL) plates with curvilinear fibers are studied. In each ply of this rectangular VSCL, the fiber-orientation angle changes linearly with respect to the horizontal coordinate. To define the modes of vibration of the laminates, a new p-version finite element, which follows third-order shear deformation theory (TSDT), is employed. The convergence properties of this new element are investigated. Taking manufacturing restrictions regarding the fiber curvatures into account, maps of natural frequencies as functions of tow-orientation angles are determined in demonstrative examples. It is verified that the use of curvilinear fibers instead of the traditional straight fibers introduces a greater degree of flexibility, which can be used to adjust frequencies and mode shapes. Crown Copyright

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8