Nonlinear Frequency Prediction of Cutout Borne Multi-Layered Shallow Doubly Curved Shell structures

Nonlinear vibration of FGM sandwich doubly curved shallow shells reinforced by FGM stiffeners subjected to mechanical and thermal loading are investigated based on the first-order shear deformation theory (FSDT) with von Karman type nonlinearity, taking into account initial geometrical imperfection and smeared stiffener technique. Four material models of the FGM sandwich shells are presented. Explicit expressions for natural frequencies, nonlinear frequency-amplitude relation, and time-deflection curves of the FGM sandwich shallow shells are derived using Galerkin method.

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Theory of Laminated Composite Doubly-Curved Shell Structures

10.15651/978-88-938-5001-8 ◽

2017 ◽

Author(s):

Francesco Tornabene ◽

Nicholas Fantuzzi

Keyword(s):

Laminated Composite ◽

Shell Structures ◽

Doubly Curved

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Analysis of paraboloid of revolution type shell structures using isoparametric doubly curved shell elements

Computers & Structures ◽

10.1016/0045-7949(90)90149-v ◽

1990 ◽

Vol 36 (5) ◽

pp. 791-800 ◽

Cited By ~ 7

Author(s):

Bimalendu Ghosh ◽

J.N. Bandyopadhyay

Keyword(s):

Shell Structures ◽

Shell Elements ◽

Paraboloid Of Revolution ◽

Doubly Curved

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Higher order formulations for doubly-curved shell structures with a honeycomb core

Thin-Walled Structures ◽

10.1016/j.tws.2021.107789 ◽

2021 ◽

Vol 164 ◽

pp. 107789

Author(s):

Francesco Tornabene ◽

Matteo Viscoti ◽

Rossana Dimitri ◽

Maria Antonietta Aiello

Keyword(s):

Higher Order ◽

Shell Structures ◽

Honeycomb Core ◽

Doubly Curved

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Vibration analysis for coupled composite laminated axis-symmetric doubly-curved revolution shell structures by unified Jacobi-Ritz method

Composite Structures ◽

10.1016/j.compstruct.2018.03.095 ◽

2018 ◽

Vol 194 ◽

pp. 136-157 ◽

Cited By ~ 37

Author(s):

Kwangnam Choe ◽

Qingshan Wang ◽

Jinyuan Tang ◽

Cijun shui

Keyword(s):

Vibration Analysis ◽

Ritz Method ◽

Shell Structures ◽

Revolution Shell ◽

Doubly Curved

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Mechanics of Laminated Composite Doubly-Curved Shell Structures

10.15651/978-88-748-8687-6 ◽

2014 ◽

Cited By ~ 7

Author(s):

Francesco Tornabene

Keyword(s):

Laminated Composite ◽

Shell Structures ◽

Doubly Curved

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Geometrically Nonlinear Vibration Attenuation of Functionally Graded Magneto-Electro-Elastic Shells

ASME 2019 Conference on Smart Materials, Adaptive Structures and Intelligent Systems ◽

10.1115/smasis2019-5533 ◽

2019 ◽

Author(s):

Subhaschandra Kattimani ◽

Sharnappa Joladarashi ◽

Vinyas Mahesh

Keyword(s):

Shear Deformation Theory ◽

Functionally Graded ◽

Piezoelectric Composite ◽

Viscoelastic Layer ◽

Control Voltage ◽

Geometrically Nonlinear ◽

Nonlinear Frequency ◽

Constrained Layer Damping ◽

Coupling Coefficients ◽

Doubly Curved

Abstract In this paper, Geometrically Nonlinear Vibrations (GNV) of Functionally Graded Magneto-Electro-Elastic (FGMEE) shells integrated with a patch of Active Constrained Layer Damping (ACLD) treatment is studied. In case of FG material, properties vary along the z-coordinates using power-law index. Finite element model is developed for FGMEE doubly curved shell using a shear deformation theory by considering non linearity to analyze the FGMEE shell. The structure consists of magnetostrictive material (CoFe2O4) and piezoelectric material (BaTiO3) FGMEE doubly curved shell with piezoelectric composite (1-3 PZC) is used as a constraining layer for viscoelastic layer, which is modelled using Golla-Hughes-McTavish (GHM) method. The analysis is carried out in time domain by considering the effects of coupling coefficients, curvature ratio and patch location on the behaviour of the nonlinear frequency of the shell. The amplitude of vibrations reduces considerably by considering the active ACLD patches (1-3 PZC) of the FGMEE shell with nominal control voltage.

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