Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Finite Element Analysis of a Shape Memory Alloy Honeycomb Vibration Absorber
Submission Author:
Gabriel Guimarães Averbug , RJ
Co-Authors:
Pedro Manuel Calas Lopes Pacheco, Ricardo Alexandre Amar de Aguiar, Marcelo Savi, ANTONIO CANDIDO RODRIGUES RAPOZO, Gabriel Guimarães Averbug
Presenter: Gabriel Guimarães Averbug
doi://10.26678/ABCM.COBEM2017.COB17-1917
Abstract
Shape memory alloys (SMAs) are smart materials with the ability of modifying their initial shape as a response to mechanical or thermal loads. As a consequence of their complex thermomechanical behavior associated with phase transformation, SMAs are able to generate significant forces and displacements. Pseudoelastic effect occurs in austenitic SMAs, which present hysteretic behavior associated with energy dissipation developed during a loading-unloading cycle. Therefore, SMA elements can be used as vibration absorbers. Since both geometric and constitutive nonlinearities take place, the design of shape memory alloys vibration absorbers presents several challenges. This work presents a numerical model based on the finite element method developed to study the energy dissipation capability of an SMA absorber connected to plates to form a honeycomb structure. The proposed methodology aims the investigation of S-shaped modular geometries with pseudoelastic elements, which can be used as efficient absorbers for vibration reduction. A constitutive model with internal variables describes the pseudoelastic behavior of SMAs.
Keywords
Shape Memory Alloys, Pseudoelasticity, vibration absorbers, honeycomb structures, Finite Element Method
