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Experimental Study of NiTi Thin-Walled Tubes Under Uniaxial Tension, Torsion, Proportional and Non-Proportional Loadings

Wed, 2015-04-15 13:39 - R.Mehrabi
Shape memory alloy
Thin-walled tube
Experimental study
Proportional
Non-proportional
hardening

The superelastic response of NiTi shape memory alloys under various loading conditions is experimentally investigated using thin-walled tube specimens. The isotropic relation between the elastic and shear moduli of austenite and martensite as well as the von Mises stress and strain equivalency are also studied in uniaxial tension and pure torsion. In addition to proportional loading, several non-proportional loading experiments based on both force and displacement control modes are conducted.

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Constitutive modeling of tension-torsion coupling and tension-compression asymmetry in NiTi shape memory alloys

Mon, 2014-07-07 10:51 - R.Mehrabi
research
Shape memory alloy
Constitutive model
tension-compression asymmetry
torsion

A 3D constitutive model is proposed and verified with experimental data. Tension-torsion coupling effect and tension-compression asymmetry effect is investigate for tube shape memory alloy.

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A thermodynamically-consistent microplane model for shape memory alloys

Mon, 2014-07-07 10:32 - R.Mehrabi
research
smart material
thermodynamic
experimental

In this paper, a macroscopic model in a thermodynamically-consistent framework for shape memory alloys is proposed.

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Microplane modeling of shape memory alloy tubes under tension, torsion, and proportional tension–torsion loading

Wed, 2014-02-26 15:53 - R.Mehrabi
research
Shape memory alloy
constitutive modeling
proportional loading

In this paper, a phenomenological constitutive
model based on microplane model is used to simulate tension, torsion and proportional tension-torsion on NiTi thin-walled tube. Validation of the
microplane model against experimental results in different loading conditions demonstrates
the capability of this approach.
This publication will benefit the numerical and experimental study on SMAs.

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3D phenomenological constitutive modeling of shape memory alloys based on microplane theory

Sun, 2013-01-20 03:45 - R.Mehrabi
research
http://iopscience.iop.org/0964-1726/22/2/025017

This paper is studied constitutive modeling of SMAs, that have some new features. Also some multiaxial loadings on SMAs are investigated experimentally.

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