Thermomechanical characterisation of a shape memory alloy for numerical modeling of its actuation response

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

Shape memory alloys (SMA) show the exceptional phenomena of shape memory effect, which is particularly interesting for an active functionalisation of lightweight structures and thus for the realisation of smart structures. To enable a simulation-based design and dimensioning process of such smart structures, the application of sophisticated material models in combination with a comprehensive material understanding is necessary. In this work, the thermomechanical material behaviour of a Nickel-Titanium-based SMA wire material is first experimentally characterised via Differential Scanning Calorimetry technique and an extensive tensile testing campaign under specific temperature conditions. Then, a novel constitutive material model for SMA wire material is proposed to model the temperature-dependent SMA behaviour in terms of the resultant force due to thermal activation. On the basis of experimentally derived model parameters, a strategy is presented for calibrating non-physical model parameters. The results show that the chosen model can reproduce the thermally activated structural behavior of the SMA wire material under consideration of the prestretch with a high level of agreement with the experiments. The proposed parameter identification methodology enables the promising material model to be used for the first time at a structural level for the design of adaptive structures.

Details

OriginalspracheEnglisch
Aufsatznummer125701
Seitenumfang16
FachzeitschriftMaterials Research Express
Jahrgang11 (2024)
Ausgabenummer12
PublikationsstatusVeröffentlicht - 20 Dez. 2024
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0003-2653-7546/work/174428909
ORCID /0000-0003-1370-064X/work/174431084
ORCID /0000-0001-7450-9641/work/174432743
Mendeley 5b51c4e3-7da5-39ea-8551-c51aa6b66cc8
Scopus 85213033274
WOS 001381081400001

Schlagworte

Schlagwörter

  • shape memory alloy, shape memory effect, smart material, finite element analysis (FEA)