Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Numerical Simulation and Experimental Procedure for Heating and Cooling of a SMA Spring Device
Submission Author:
Andersson Oliveira , PB , Brazil
Co-Authors:
Paulo César Sales da Silva, José Ricardo Ferreira Oliveira, Romulo Pierre Batista dos Reis, Antonio Almeida Silva, Celso Rosendo Bezerra Filho, Andersson Oliveira
Presenter: Antonio Almeida Silva
doi://10.26678/ABCM.COBEM2017.COB17-1973
Abstract
Response time is an important parameter for performance of devices that uses SMA (Shape Memory Alloys). SMA are special metal materials that have the ability to recover a "plastic" deformation introduced at a low temperature by means of subsequent heating above a critical temperature. Due to their characteristics, these alloys have a great application in control systems. Alloys with shape memory have been applied in various sectors of industry such as naval, aeronautical, nuclear, automotive, home appliances, robotics, medical, dental, etc. SMA response time is slow when is compared with other active materials, then is important devote studies to improve time response and applies a suitable mathematical modeling behavior to help control design systems that uses SMA. In this paper was numerically calculated the time heating and cooling of a SMA spring and compared simulation with experimental results. In the experiment, spring is heating by electrical current and cooled by forced convection. Using energy balance equation and choose most relevant parameters was verified that electrical current value and martensitic phase transformation model are the most determinant parameters to precision of modeling. The knowledge model allows verify device performance previously and adjust project parameters to achieve best results.
Keywords
SMA, time response, Simulation, heating-and-cooling, Springs
