Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EXPERIMENTAL AND NUMERICAL ANALYSIS OF THE BEHAVIOR OF NITI HELICAL MINI-SPRING UNDER LARGE STRAIN
Submission Author:
José Marques Basílio Sobrinho , PB
Co-Authors:
José Marques Basílio Sobrinho, Felipe Marques Farias Filho, Cícero da Rocha Souto
Presenter: José Marques Basílio Sobrinho
doi://10.26678/ABCM.COBEM2019.COB2019-1857
Abstract
This work has as its objective to simulate the behavior of a superelastic NiTi helical mini spring under large deformations (above 300%). Specifically, two types of loadings were used in these simulations, one simple ramp deformation and the other with intermediate a hysteric loop. These simulations were made by implementing two numerical models proposed by Auricchio based on the SMA properties, both models are within the ANSYS® software, which was used in the simulations. One model was based in the Superelasticity (SUPE) and the other based in the Shape Memory Effect (SME). The results were verified when directly compared to the mini spring experimental responses. In the simple loading case both models were able to reproduce the real phenomenon with enough precision. For the loading in loop, only in the SME model was it possible the representation the phenomenon. It was verified that the simulation using the SUPE model requires only 10% of the time for the simulation using the SME.
Keywords
Superelastic mini spring, shape memory effect, Superelasticity, Finite Element Method
