We present a mathematical model describing the auxetic-austenitic phase transition phenomenon by a second order shape memory phase transition. The typical properties of auxetic materials, as the negative Poisson ratio ν, are described by a function of the phase ϕ, called order parameter, which relates the phase transition with a change of the internal order structure of the material. In our model, the auxetic phase is represented by an order parameter ϕ = 1, which provides a negative Poisson's ratio, while the austenitic phase will be denoted by ϕ = 0.

Shape memory and phase transitions for auxetic materials

CIARLETTA, Michele;FABRIZIO, MAURO;TIBULLO, VINCENZO
2014

Abstract

We present a mathematical model describing the auxetic-austenitic phase transition phenomenon by a second order shape memory phase transition. The typical properties of auxetic materials, as the negative Poisson ratio ν, are described by a function of the phase ϕ, called order parameter, which relates the phase transition with a change of the internal order structure of the material. In our model, the auxetic phase is represented by an order parameter ϕ = 1, which provides a negative Poisson's ratio, while the austenitic phase will be denoted by ϕ = 0.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4234653
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