Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Dynamics of a self-folding cylindrical system actuated by SMA
Submission Author:
Guilherme Vieira Rodrigues , RJ , Brazil
Co-Authors:
Larissa Fonseca, Marcelo Savi, Alberto Paiva, Guilherme Vieira Rodrigues
doi://10.26678/ABCM.COBEM2017.COB17-2655
Abstract
Self-folding structures based on origami art have inspired many design projects in engineering field. Such structures are able to change their shape and size expressively. Smart materials are widely employed as actuators. Shape Memory Alloys (SMA) belongs to this class of materials and provides a wide field of displacement or force actuation by varying their temperature. Dynamics of a cylindrical shaped origami structure with the ability of changing its radius is investigated in this work. Actuation is provided by torsional SMA wires placed on origami creases. A polynomial constitutive model is considered to describe the thermomechanical behavior of the actuators. A 1-DOF model is established based on geometric assumptions. The system behavior is investigated under thermomechanical loadings. Constitutive and geometric nonlinearities enriches the dynamic responses of the system.
Keywords
self-folding structures, origami-inspired devices, Shape memory alloys (SMA), nonlinear dynamics
