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A Micromechanical Model for Polycrystalline Shape Memory Alloys – Formulation and Numerical Validation

  • Rainer HeinenEmail author
  • Klaus Hackl
Conference paper
  • 676 Downloads
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 21)

Abstract

The specific material properties of shape memory alloys are due to the formation of martensitic microstructures. In this contribution, we develop a strategy to model the material behavior based on energy considerations: we first present narrow bounds to the elastic energy obtained by lamination of the multi-well problem in the monocrystalline case. These considerations are then extended to polycrystals and compared to a convexification bound. Due to the acceptably low difference between convexification lower and lamination upper bound,we use the convexification bound to establish a micromechanical model which, on the basis of physically well motivated parameters such as elastic constants and transformation strains, is able to represent a variety of aspects of the material behavior such as pseudoelasticity, pseudoplasticity and martensite reorientation.

Keywords

Elastic Constant Shape Memory Alloy Elastic Energy Material Behavior Transformation Strain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Werkstoffkompetenzzentrum, Division Auto, ThyssenKrupp Steel AGDuisburgGermany
  2. 2.Lehrstuhl für Allgemeine MechanikRuhr-Universität BochumBochumGermany

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