Journal ArticleDOI
Nonlinear forced vibrations of FGM sandwich cylindrical shells with porosities on an elastic substrate
Yun Fei Liu,Zhaoye Qin,Fulei Chu +2 more
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In this article, a step function and a porosity volume fraction are introduced to describe the porosities in functionally graded material (FGM) sandwich cylindrical shells with porosity on an elastic substrate.Abstract:
The nonlinear forced vibrations of functionally graded material (FGM) sandwich cylindrical shells with porosities on an elastic substrate are studied. A step function and a porosity volume fraction are introduced to describe the porosities in FGM layers of sandwich shells. Using the Donnell’s nonlinear shallow shell theory and Hamilton’s principle, an energy approach is employed to gain the nonlinear equations of motion. Afterwards, the multi-degree-of-freedom nonlinear ordinary differential equations are carried out by using Galerkin scheme, and subsequently the pseudo-arclength continuation method is utilized to perform the bifurcation analysis. Finally, the effects of the core-to-thickness ratio, porosity volume fraction, power-law exponent, and external excitation on nonlinear forced vibration characteristics of FGM sandwich shells with porosities are investigated in detail.read more
Citations
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Journal ArticleDOI
Nonlinear forced vibrations of functionally graded piezoelectric cylindrical shells under electric-thermo-mechanical loads
Yun Fei Liu,Zhaoye Qin,Fulei Chu +2 more
TL;DR: In this article, the authors developed a new solution approach to solve nonlinear forced vibrations of functionally graded (FG) piezoelectric shells in multi-physics fields.
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Frequency-dependent damped vibrations of multifunctional foam plates sandwiched and integrated by composite faces
Babak Safaei,Babak Safaei +1 more
TL;DR: In this paper, the authors investigated the damped vibrational behavior of a lightweight composite plate subjected to a periodic load within a limited time by using the first-order shear deformation theory of plates.
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Investigation of magneto-electro-thermo-mechanical loads on nonlinear forced vibrations of composite cylindrical shells
TL;DR: In this article , a coupled nonlinear modeling for composite cylindrical shells is developed by the improved Donnell nonlinear shell theory and Maxwell static electricity/magnetism equations.
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Dynamic responses of corrugated cylindrical shells subjected to nonlinear low-velocity impact
TL;DR: In this article , a new equivalent shell model of corrugated cylindrical shells is established, and the governing equations are obtained by using the Love thin shell theory and Hamilton principle, and then turned into ordinary differential equations by the Galerkin procedure, upon which numerical solutions are achieved by the Duhamel integration and small-time increment technique.
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Primary resonance of double-curved nanocomposite shells using nonlinear theory and multi-scales method: Modeling and analytical solution
TL;DR: In this article, the forced vibration of double-curved nanocomposite shells under a time dependent excitation is studied using nonlinear shell theory and multi-scales method in primary resonance.
References
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Book
Functionally graded materials : design, processing and applications
TL;DR: In this paper, the authors introduce lessons from Nature Graded Microstructures Modeling and Design The Characterization of Properties Processing and Fabrication Applications Summary and Outlook Index, and provide an overview of the current state of the art.
Book
Nonlinear Vibrations and Stability of Shells and Plates
TL;DR: In this article, a comparison of different shell theories for nonlinear vibrations and stability of circular cylindrical shells is presented. But the authors do not consider the effect of boundary conditions on the large-amplitude vibrations of circular cylinders.
Journal ArticleDOI
Vibration of functionally graded cylindrical shells
C.T. Loy,K.Y. Lam,J. N. Reddy +2 more
TL;DR: In this article, a study on the vibration of cylindrical shells made of a functionally gradient material (FGM) composed of stainless steel and nickel is presented, the objective is to study the natural frequencies, the influence of constituent volume fractions and the effects of configurations of the constituent materials on the frequencies.
Journal ArticleDOI
New features of the software MatCont for bifurcation analysis of dynamical systems
TL;DR: Software issues that are in practice important for many users, e.g. how to define a new system starting from an existing one, how to import and export data, system descriptions, and computed results are discussed.
Journal ArticleDOI
Fabrication and electromagnetic characteristics of electromagnetic wave absorbing sandwich structures
TL;DR: In this paper, the radar absorbing structures (RAS) having sandwich structures in the X-band (8.2-12.4 GHz) frequencies were designed and fabricated, and the reflection loss characteristics for multi-layer sandwich structures were calculated using the theory of transmission and reflection in a multi-layered medium.
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