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Nonlinear finite element aeroelastic modelling of reinforced aircraft skin panels

Grant number: 17/26284-6
Support type:Scholarships in Brazil - Master
Effective date (Start): April 01, 2018
Effective date (End): August 31, 2018
Field of knowledge:Engineering - Aerospace Engineering - Aerospace Structures
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Flávio Donizeti Marques
Grantee:Douglas Ramalho Queiroz Pacheco
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


Panel flutter is an aeroelastic phenomenon that can cause critical structural failure in aerospace vehicles operating at supersonic speeds. A reliable modelling of such phenomenon is crucial for safely predicting the fatigue life of aerospace skin, thus being of great importance to structural design. Moreover, aircraft panels are typically composed of large plates which are internally reinforced by stringers, longerons and/or frames. The use of such stiffening elements ends up subdividing the panel into multiple cells which can interact during flutter, thereby potentially making the aeroelastic motion more complex and dangerous. In this context, the present work proposes the study and implementation of a computational finite element model for the study of nonlinear flutter in stiffened panels. The coupling of the Mindlin plate model and the Timoshenko beam model, both in geometrically nonlinear regime, is proposed. The model and the analyses will tackle both isotropic and laminated panels. The aerodynamic load will be computed through first-order piston theory, which provides good results for high-supersonic flows. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GUIMARAES, THIAGO A. M.; SANCHES, LEONARDO; MARQUES, FLAVIO D. Nonlinear supersonic post-flutter motion of panels with adjacent bays and thermal effects. INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, v. 125, OCT 2020. Web of Science Citations: 0.
PACHECO, DOUGLAS R. Q.; MARQUES, FLAVIO D.; FERREIRA, ANTONIO J. M. Finite element analysis of fluttering plates reinforced by flexible beams: An energy-based approach. Journal of Sound and Vibration, v. 435, p. 135-148, NOV 24 2018. Web of Science Citations: 6.
PACHECO, DOUGLAS R. Q.; MARQUES, FLAVIO D.; FERREIRA, ANTONIO J. M. Panel flutter suppression with nonlinear energy sinks: Numerical modeling and analysis. INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, v. 106, p. 108-114, NOV 2018. Web of Science Citations: 5.

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