Flutter analysis of composite laminates with curvilinear fibres

• Type: Article in International Conference Proceedings Book
• Date: 2017

Authors

Akhavan, H (Author) Other; Pedro Leal Ribeiro (Author) FEUP

Conference proceedings International

Title: COMPDYN 2017 - Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering

Pages: 3763-3770

6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2017

15 June 2017 through 17 June 2017

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-00N-NAN

DOI: 10.7712/120117.5682.17469

Abstract (EN): In this investigation, the authors intend to study the dynamic instability (flutter) of variable stiffness composite laminates (VSCLs) in the presence of supersonic flow. In the type of VSCL considered here, plies have curvilinear fibres and, consequently, the stiffness is variable in a macroscopic view. The plates considered are rectangular. In each ply, a reference fibre path, represented by a function of horizontal coordinate x, is defined. The reference fibre path orientation changes linearly from T0 at the centre to T1 at both vertical edges of the ply; the other fibre paths are defined shifting the reference path in direction y. The displacement and rotations are defined using a Third-order Shear Deformation Theory, and then they are discretised by a p-version finite element model that applies to VSCL plates. Piston theory is employed to model the aerodynamic force of the upstream flow in direction x. Flutter airspeeds are investigated for VSCL plates with different fibre angles. Changes of flutter speed are evaluated in two different regimes of steady and unsteady flow.

Language: English

Type (Professor's evaluation): Scientific