PHENOMENOLOGICAL MODELING OF THE THERMO-MAGNETO-MECHANICAL BEHAVIOR OF MAGNETIC SHAPE MEMORY ALLOYS
Vandré F. De Souza1; Marcelo A. Savi1; Alberto Paiva2; Luciana L. Silva3
1 Universidade Federal do Rio de Janeiro COPPE - Department of Mechanical Engineering; 2 Universidade Federal Fluminense - Escola de Engenharia Industrial Metalúrgica de Volta Redonda; 3 CEFET/RJ - Department of Mechanical Engineering
doi:10.20906/CPS/CON-2016-0394
Resumo
Magnetic shape memory alloys (MSMA) is an interesting class of material that offers fast actuation and the option of contactless control of large deformations. This paper deals of a new constitutive model based on internal variables that describes the characteristics of the phenomenological behavior of the MSMA. Four macroscopic phase are considered incorporating austenitic phase and three variants of martensitic phase. A numerical procedure is proposed to deal with the nonlinearities of the model. Model predictions are presented for different loadings, including magnetic field induced phase transformations and magnetic field induced reorientation. Model capabilities are investigated considering numerical simulations. A comparison with experimental data available in literature attests the model ability to capture the general thermo-magneto-mechanical behavior of MSMA.
Palavras-chave: Magnetic shape memory alloys; Constitutive modeling; Reversible magnetic shape memory effect; Magnetic field-induced phase transformation; Magnetic field-induced reorientation