Experimental Characterization and Numerical Modelling of a Pseudo Elastic Behaviour of Ti-Ni Shape Memory Alloys

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The aim of this work is to effect experimental investigations comparatively to numerical simulations on superelastic shape-memory alloys (SMAs) and specially its importance when this latter is reinforced by smart composite materials. The obtained material is then a special kind of “smart materials” whose dimensions change due to temperature variations depending on structural phase transition. The shape memory alloys were investigated by means of differential scanning calorimetry (DSC) and tensile testing; however, the superelastic model is simulated by hysteresis modeling of SMA materials based on finite elements method (FEM). The obtained results of the numerical simulations are compared with the experimental work and good correlations between the stress-strain curves for different cases of temperatures are found. Consequently, and beyond this work, these results allow the concept, the design, the modelling as well as the production of smart composite materials reinforced by SMA.
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Smart Materials; Shape Memory Alloys; Phase Transformations; Finite Elements Method

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