Chapter 3- Modeling of the Two-Way Shape Memory Effect
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Date
2018
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Publisher
IntechOpen
Abstract
The shape memory alloys (SMA) are distinguished from other conventional materials by a
singular behavior which takes many forms depending on the thermomechanical load. The
two-way shape memory effect is one of these forms. The interest that exhibits this behavior
is that the material can remember two states, so this leads to many industrial applications.
This thermoelastic property is driven by the temperature under residual stress of
education. To model this effect in 3D, we considered stress and temperature as control
variables and the fraction of martensite as internal variable; choosing Gibbs free energy
expression and applying thermodynamic principles with transformation criteria have
permitted to write the constitutive equations that control this behavior. The constructed
model is then numerically simulated, and finally, the proposed model appears applicable
in engineering.