Investigation of shape memory and super elasticity behaviors using various micromechanical models due to thermomechanical monotonic and cyclic loads

Authors

Abstract

In the present paper, accuracies of various micromechanical models in reproducing the one-dimensional shape memory and super elasticity behaviors are investigated. In this regard, Brinson’s model is extended based on the loading path dependency of the martensite volume fraction. Different loading paths including individual, combined, and cyclic variations of the temperature and stress are considered. It is generally assumed that the compressive material properties are different from the tensile ones. Furthermore, accuracy of results of the various loadings is evaluated based on the Young moduli predicted using the well-known Reuss, Voigt, and Mori-Tanaka (with spherical and elliptical shape factors) micromechanical homogenization techniques. Moreover, results of the prepared computer code are validated through comparing them with the experimental results available in the literatures. Results reveal that differences among predictions of the four micromechanical models are significant for the cyclic loadings.

Keywords


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