On intrinsic time measure in the modeling of cyclic behavior of a Nitinol cubic block

In this paper, the cyclic behavior of a superelastic-plastic nitinol cubic block is described by using the Bouc-Wen model coupled to an intrinsic time measure other than clock time, which governs the behavior of the materials. As a consequence, the thermodynamic admissibility of the Bouc-Wen model i...

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Bibliographic Details
Published in:Smart materials and structures 2015-03, Vol.24 (3), p.35022-11
Main Authors: Chiroiu, Veturia, Florinel Ionescu, Marius, Sireteanu, Tudor, Ioan, Rodica, Munteanu, Ligia
Format: Article
Language:English
Subjects:
Blocking
Bouc-Wen model
Degradation
endochronic theory of plasticity
Intermetallics
intrinsic time measure
Mathematical models
Nickel titanides
nitinol polycrystals
Shape memory alloys
Surface layer
Texture
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Summary:In this paper, the cyclic behavior of a superelastic-plastic nitinol cubic block is described by using the Bouc-Wen model coupled to an intrinsic time measure other than clock time, which governs the behavior of the materials. As a consequence, the thermodynamic admissibility of the Bouc-Wen model is provided by the endochronic theory of plasticity. The role of the intrinsic time measure is described by capturing the stiffness and strength degradation and the opposite phenomena. Such behavior is due to the permanent-strain addition of residual martensite and alterations in the properties of the texture during phase transformation.
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/24/3/035022