• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)
  • View Item
  • Home
  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Phenomenological model for phase transformation characteristics of textured shape memory alloys

Conférence invitée
Author
CHATZIATHANASIOU, Dimitris
CHEMISKY, Yves
ccMERAGHNI, Fodil
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]
CHATZIGEORGIOU, George
PATOOR, Etienne

URI
http://hdl.handle.net/10985/10137
DOI
10.1002/9781119090427.ch21
Date
2015

Abstract

In the present study, a new transformation criterion that includes the effect of tension- compression asymmetry and texture-induced anisotropy is proposed and combined with a thermodynamical model to describe the thermomechanical behavior of polycrystalline shape memory alloys. An altered Prager criterion has been developed, introducing a general transformation of the axes in the stress space. A convexity analysis of such criterion is included along with an identification strategy aimed at extracting the model parameters related to tension-compression asymmetry and anisotropy. These are identified from a numerical simulation of a SMA polycrystal, using a self-consistent micromechanical model previously developed by Patoor et al. (Patoor, E., Eberhardt, A., Berveiller, M., 1996. Micromechanical Modelling of Superelasticity in Shape Memory Alloys. Journal de Physique IV 6, C1 277) for several loading cases on isotropic, rolled and drawn textures. Transformation surfaces in the stress and transformation strain spaces are obtained and compared with those predicted by the micromechanical model. The good agreement obtained between the macroscopic and the microscopic polycrystalline simulations states that the proposed criterion and transformation strain evolution equation can capture phenomenologically the effects of texture on anisotropy and asymmetry in SMAs.

Files in this item

Name:
2015_MEMA__2015_CHATZIGEORGIOU.pdf
Size:
896.7Kb
Format:
PDF
View/Open

Collections

  • Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3)

Related items

Showing items related by title, author, creator and subject.

  • Influence of phase transformation anisotropy on transformation surface around a crack tip 
    Conférence invitée
    PATOOR, Etienne; MOHARA, Guillaume; CHATZIATHANASIOU, Dimitris; CHEMISKY, Yves; CHATZIGEORGIOU, George; ccMERAGHNI, Fodil (2016)
    A transformation criterion that includes the effect of tension-compression asymmetry and texture-induced anisotropy is used to describe the size of the transformation region surrounding the tip of an edge crack in a shape ...
  • Phase Transformation of Anisotropic Shape Memory Alloys: Theory and Validation in Superelasticity 
    Article dans une revue avec comité de lecture
    CHATZIATHANASIOU, Dimitris; CHEMISKY, Yves; ccMERAGHNI, Fodil; CHATZIGEORGIOU, George; PATOOR, Etienne (Springer, 2015)
    In the present study, a new transformation criterion that includes the effect of tension–compression asymmetry and texture-induced anisotropy is proposed and combined with a thermodynamical model to describe the thermomechanical ...
  • Modeling of coupled phase transformation and reorientation in shape memory alloys under non-proportional thermomechanical loading 
    Article dans une revue avec comité de lecture
    CHATZIATHANASIOU, Dimitris; CHEMISKY, Yves; CHATZIGEORGIOU, George; ccMERAGHNI, Fodil (Elsevier, 2016)
    In the present study, a new 3D thermodynamic coupled model is proposed for SMAs. The behavior of SMA structures is described through several strain mechanisms, each associated with its proper internal variables. This model ...
  • Thermomechanically coupled model for non-proportional loading in SMAS 
    Conférence invitée
    CHATZIATHANASIOU, Dimitris; CHEMISKY, Yves; CHATZIGEORGIOU, George; ccMERAGHNI, Fodil (2016)
    In this work, a new 3D thermomechanically coupled phenomenological model is proposed for SMAs. SMA behavior is described through several strain mechanisms, each associated with its proper internal variables. Forward and ...
  • Cyclic loading effects on NITI alloys under biaxial conditions 
    Conférence invitée
    CHATZIATHANASIOU, Dimitris; BOURGEOIS, Nadine; CHEMISKY, Yves; ccMERAGHNI, Fodil (2016)
    In this work, the influence of the direction and the history of thermomechanical loading of NiTi shape memory alloys on the overall material behavior is experimentally investigated. In the first part, cyclic biaxial ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales