A coupled dissipation functional for modeling the functional fatigue in polycrystalline shape memory alloys

authored by

Johanna Waimann, Philipp Junker, Klaus Hackl

Abstract

The pseudoelastic material behavior is one outstanding feature of shape memory alloys. This effect comes along with the forming of two plateaus in the stress/strain diagram of a tension test. Cyclic loading leads to a decrease particularly of the upper stress-plateau due to the evolution of plastic deformations which also implies fatigue of the material. In this work, we develop a variational material model which is able to predict the effect of fatigue using a novel approach for the dissipation potential that couples the evolutions of phase transformations and plastic strains.

External Organisation(s)

Ruhr-Universität Bochum

Type

Article

Journal

European journal of mechanics

Volume

55

Pages

110-121

No. of pages

12

Publication date

01.01.2016

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Materials Science(all), Mechanics of Materials, Mechanical Engineering, Physics and Astronomy(all)

Electronic version(s)

https://doi.org/10.1016/j.euromechsol.2015.08.001 (Access: Closed)

 

Details in the research portal "Research@Leibniz University"