On modelling of the one dimensional pseudoelastic effect of shape memory alloys
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Date
2025
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Abstract
Abstract. Last decades, a qualitative leap in materials engineering was observed, through developing new
materials or discovering new properties. The shape memory alloys are a group of materials exhibiting singular
behaviour under a coupled thermomechanical loading, and they are widely used in numerous applications because
of their properties. To exploit these properties in engineering, several constitutive models of were developed. The
aim of this work is to build a constitutive model that could describe the pseudoelastic behaviour of shape memory
alloys in a simpler and more accurate way. Based on thermodynamics and mechanics laws and principles, the
developed constitutive model was implemented in an algorithm and compared with experimental data in order to
assess its accuracy. The obtained results indicated that the agreement between the real and computer-simulated
stress-strain curves was good. This reaffirmed the model’s ability to predict the pseudoelastic behaviour of the shape
memory materials under various loading states. These results thus validate especially the temperature sensitivity of
Nitinol alloys, which should be taken into account when designing devices that need to function reliably.
Keywords: Pseudoelasticity / memory / thermomechanical / transformation / fraction