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Finite element implementation and simulation of the functional fatigue in shape memory alloys
Author(s) -
Waimann Johanna,
Junker Philipp,
Hackl Klaus
Publication year - 2017
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201710209
Subject(s) - pseudoelasticity , shape memory alloy , materials science , martensite , austenite , sma* , diffusionless transformation , finite element method , crystallite , representative elementary volume , thermodynamics , composite material , metallurgy , microstructure , computer science , physics , algorithm
Due to the effects of pseudoelasticity and pseudoplasticity, shape memory alloys (SMAs) are very promising materials for the industrial usage. However, applications of SMA are still challenging due to the functional degradation during cyclic loading. The related effect of functional fatigue which occurs during pseudoelastic loading is modeled by subdividing the diffusionless solid/solid phase transformation into a reversible and an irreversible process which is an experimentally motivated ansatz for the complex material behavior, see e.g. [1]. Thus, we take into account a reversible and an irreversible volume fraction for the austenitic and several martensitic phases. To consider the material's polycrystalline structure and hence, differently oriented grains, we use an orientation distribution function which depends on three Euler angles and affects a high numerical efficiency as presented in [2]. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)