Descrição do comportamento termomecânico de ligas com memória de forma a partir do modelo de Preisach

Abstract

This work aims to investigate the description of the thermomechanical behavior of shape memory alloys, based on the classic Preisach model. The Preisach model describes a hysteresis based on rectangular operators in an abstract space. Its fit with experimental data can be done by constructing the Everett surface. Experimental tests are performed to be used as a reference. At first, this work establishes a verification of the model using the experimental results of pseudoelasticity. Afterwards, others characteristics are investigated using data available in the literature. The results show that the model responses are in agreement with the experimental data. In this way, the Preisach model proved to be an interesting approach to describe the thermomechanical behavior of shape memory alloys and can serve as a basis for several applications.