This research presents the mathematical modeling for the nonlinear oscillations analysis of a pre-stretched hyperelastic annular membrane with varying density under finite deformations. The membrane material is assumed to be homogeneous, isotropic, and neo-Hookean and the variation of the membrane density in the radial direction is investigated. The membrane is first subjected to a uniform radial traction along its outer circumference and the stretched membrane is fixed along the outer boundary. Then the equations of motion of the pre-stretched membrane are derived. From the linearized equations of motion, the natural frequencies and mode shapes of the membrane are obtained analytically. The vibration modes are described by hypergeometric functions, which are used to approximate the nonlinear deformation field using the Galerkin method. The results are compared with the results evaluated for the same membrane using a nonlinear finite element formulation. The results show the influence of the stretching ratio and varying density on the linear and nonlinear oscillations of the membrane.
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ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 6–9, 2017
Cleveland, Ohio, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-5822-6
PROCEEDINGS PAPER
Nonlinear Oscillations of Hyperelastic Annular Membranes With Varying Density Available to Purchase
Renata M. Soares,
Renata M. Soares
Federal University of Goiás, Goiânia, Brazil
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Paulo B. Gonçalves
Paulo B. Gonçalves
Catholic University, PUC-Rio, Rio de Janeiro, Brazil
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Renata M. Soares
Federal University of Goiás, Goiânia, Brazil
Paulo B. Gonçalves
Catholic University, PUC-Rio, Rio de Janeiro, Brazil
Paper No:
DETC2017-67189, V008T12A021; 4 pages
Published Online:
November 3, 2017
Citation
Soares, RM, & Gonçalves, PB. "Nonlinear Oscillations of Hyperelastic Annular Membranes With Varying Density." Proceedings of the ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 8: 29th Conference on Mechanical Vibration and Noise. Cleveland, Ohio, USA. August 6–9, 2017. V008T12A021. ASME. https://doi.org/10.1115/DETC2017-67189
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