Structural integrity assessment on cracked composites interaction with aeroelastic constraint by means of XFEM

Abdullah, Nur Azam and Akbar, Mahesa and Wirawan, Nanda and Curiel-Sosa, Jose Luis (2019) Structural integrity assessment on cracked composites interaction with aeroelastic constraint by means of XFEM. Composite Structures. ISSN 0263-8223

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Abstract

In this paper, a novel approach in assessing the structural integrity of cracked composite plates under the aeroelastic condition by using XFEM is presented. To the authors’ knowledge, this is the first time that aeroelastic condition is coupled in XFEM to model the crack propagations. Previous researches from the literature had only considered a static crack condition. This research focuses on determining the first failure experienced by the cracked composite plate, either the crack will propagate causing a fracture, or the composite plate will fail due to aeroelastic instability imposed at the critical flutter speed. The proposed scheme is used to solve the limitation in XFEM within Abaqus that only general static and implicit dynamic analysis can be performed. The structure is assumed to interact with minimal gust, and the deflections by time are expressed in the equation of periodic motion based on Fourier Series Function (FSF). The results show that at a particular fibre orientation, once the damaged composite plate is deformed due to the dynamics load at dive speed, it fails due to the crack propagation first instead of the flutter. In contrast, another fibre configuration shows good resistance to crack propagation and fails due to flutter instability.

Item Type:	Article (Journal)
Additional Information:	8760/74960
Uncontrolled Keywords:	Aeroelastic; Crack; Composite structure; Extended Finite Element Method (XFEM); Fourier Series Function (SFS); Gust
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ170 Mechanics applied to machinery. Dynamics T Technology > TJ Mechanical engineering and machinery > TJ181 Mechanical movements 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 > Department of Mechanical Engineering
Depositing User:	Dr. Nur Azam Abdullah
Date Deposited:	21 Oct 2019 10:21
Last Modified:	21 Oct 2019 10:34
URI:	http://irep.iium.edu.my/id/eprint/74960

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