Flutter assessment on composite plate with crack by means of fully coupled Finite Element and Doublet Lattice Method

Abdullah, Nur Azam and Curiel-Sosa, Jose Luis and Akbar, Mahesa (2017) Flutter assessment on composite plate with crack by means of fully coupled Finite Element and Doublet Lattice Method. In: 3rd International Conference on Mechanics of Composites (MechComp 2017), 4th-7th July 2017, Bologna, Italy. (Unpublished)

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Abstract

This paper presents an investigation on flutter behaviour of composite plate with crack. This work is divided into two sections; (a) variation of crack length at a fix location on the plate, (b) variation of crack location on the plate with a fix crack length. The composite plate is modelled as unidirectional composite for 0°, 45° and 90° orientation. Mori-Tanaka homogenization model is applied to obtain the effective composite constitutive properties as the function of fiber and matrix volume fraction. Shell elements are implemented to model the plate structure. Doublet Lattice Method (DLM) is used to calculate the unsteady aerodynamic forces. PK-method is applied to obtain the flutter solution. For section (a), the results show that as the length of the crack increased, the damping of the system is decreased, thus the critical flutter speed decreased for all fiber orientation. However, for section (b), the critical flutter speed is found to be increasing as the crack location move from the root of the plate to the tip of the plate, as the aerodynamics load is almost similar to the undamaged plate.

Item Type:	Conference or Workshop Item (Slide Presentation)
Additional Information:	8760/74972
Uncontrolled Keywords:	flutter, crack, composite.
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL787 Astronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Dr. Nur Azam Abdullah
Date Deposited:	31 Oct 2019 16:19
Last Modified:	31 Oct 2019 16:25
URI:	http://irep.iium.edu.my/id/eprint/74972

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