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COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Nonlinear Dynamics and Chaos of an SMA-Hybrid Composite Oscillator
Submission Author:
Lucas Vignoli , RJ , Brazil
Co-Authors:
Felipe Rodrigues de Freitas Neto, Marcelo Savi, Wallace Moreira Bessa, Lucas Vignoli
Presenter: Lucas Vignoli
doi://10.26678/ABCM.COBEM2017.COB17-1526
Abstract
Composite materials have been widely used because its great capability to join high strength and stiffness in lightweight structures. Shape memory alloy hybrid composite (SMAHC) is an interesting alternative to build adaptive composites that increase even more the applicability of this kind of material. The aim of this paper is to study nonlinear dynamics of an oscillator with SMAHC element. A polynomial constitutive model is employed to describe the SMA fiber thermomechanical behavior while the matrix material is modelled as linear elastic element. A homogenized model is developed for the SMAHC that is employed in a mechanical oscillator in order to analyze the dynamical response. Numerical simulations are carried out evaluating system responses and the influence of SMA fiber volume fractions. Results show that even 0.1% of SMA volume fraction may be responsible to define a chaotic or periodic response.
Keywords
Shape memory alloys (SMA), Composite Materials, chaos, Vibration
