Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
PREISACH MODEL APPLIED TO THE THERMOMECHANICAL DESCRIPTION OF SHAPE MEMORY ALLOYS
Submission Author:
Thiago Alvares , RJ
Co-Authors:
Thiago Alvares, Vanderson Dornelas, Marcelo Savi, sergio oliveira
Presenter: Marcelo Savi
doi://10.26678/ABCM.COBEM2023.COB2023-2408
Abstract
Shape memory alloys (SMAs) are adaptive materials that exhibit complex thermomechanical behaviors, including shape memory effect, pseudoelasticity, phase transformation due to temperature variation, internal subloops due to incomplete phase transformation, and tension-compression asymmetry. Due to all these phenomena, the thermomechanical modeling of SMAs is a complex task. Besides, these materials have a significant potential for applications in different areas. Consequently, the modeling of SMAs has scientific and technological relevance. Preisach model is an interesting alternative to describe the SMA hysteretic behavior. This paper presents a numerical investigation of the Preisach model applied to describe the thermomechanical behavior of SMAs. Numerical simulations are carried out to investigate the model capabilities to capture the SMAs behavior. Results are compared with experimental data available in the literature showing to be in close agreement. The Preisach model showed to be an interesting approach since it presents good results combined with a simple numerical implementation when compared to phenomenological and thermodynamic-based models.
Keywords
Shape Memory Alloys, Hysteresis, Preisach model, Everett function, numerical simulations
