Variational Modeling and Finite-Element Simulation of Functional Fatigue in Polycrystalline Shape Memory Alloys
- verfasst von
- Johanna Waimann, Klaus Hackl, Philipp Junker
- Abstract
Based on our previous works, we present the finite-element implementation of an energy-based material model that displays the effect of functional fatigue of shape memory alloys during cyclic loading. The functional degradation is included in our model by taking account of irreversible martensitic volume fractions. Three internal variables are used: reversible and irreversible volume fractions for the crystallographic phases and Euler angles for parametrization of the martensite strain orientation. The evolution of the volume fractions is modeled in a rate-independent manner, whereas a viscous approach is employed for the Euler angles, which account for the materials’ polycrystalline structure. For the case of a cyclically loaded wire, we calibrate our model using experimental data. The calibration serves as input for the simulation of two more complex boundary value problems to demonstrate the functionality of our material model for localized phase transformations.
- Externe Organisation(en)
-
Rheinisch-Westfälische Technische Hochschule Aachen (RWTH)
Ruhr-Universität Bochum
- Typ
- Artikel
- Journal
- Journal of Optimization Theory and Applications
- Band
- 184
- Seiten
- 98-124
- Anzahl der Seiten
- 27
- ISSN
- 0022-3239
- Publikationsdatum
- 30.01.2019
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Steuerung und Optimierung, Managementlehre und Operations Resarch, Angewandte Mathematik
- Elektronische Version(en)
-
https://doi.org/10.1007/s10957-019-01476-0 (Zugang:
Geschlossen)
