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An Eulerian Model for Pseudoelastic Shape Memory Alloys

✍ Scribed by Ch. Müller; O.T. Bruhns

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
235 KB
Volume
35
Category
Article
ISSN
0933-5137

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✦ Synopsis

Abstract

A thermodynamic model describing pseudoelasticity is proposed. The kinematics are based on a self‐consistent Eulerian theory of finite deformations using the logarithmic rate. The thermomechanical state of the material is described by means of the mass fraction of martensite as internal state variable. From the Helmholtz free energy of the two‐phase solid, a kinetic law for the evolution of martensite is derived, taking into account the heat generated during phase transition. The material model is implemented into a finite element code in an updated Lagrangian scheme. Its parameters are calibrated to experimental data. The characteristics of the model are illustrated by simulations under different loading conditions.

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