Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Inferring Superelasticity Parameters of NiTi SMA from Indentation Data
Submission Author:
Francisco Fernando Roberto Pereira , PE
Co-Authors:
Francisco Fernando Roberto Pereira
Presenter: Francisco Fernando Roberto Pereira
doi://10.26678/ABCM.COBEM2017.COB17-2898
Abstract
Among the most important Shape Memory Alloys (SMA), NiTi have been widely investigated because of their outstanding Shape Memory Effect (SME) and Superelasticity (SE), damping capacity and biocompatibility. Given the importance of NiTi SMA, this work will describe uniaxial stress-strain testing of a NiTi shape memory alloy, obtaining best-fit values of the parameters in an FEM model describing this behaviour over a suitable strain range (up to about 10%) and then inverse procedures for inferring these parameters by searching for combinations that maximise the value of g associated with experimental load-displacement plots during indentation. As with plasticity parameters, it is found that use of more than one indenter shape assists in converging on the best fit solution and optimal “g-scanning” procedures are identified.
Keywords
Superelasticity, NiTi, Indentation, Methodology
