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Alliages à Mémoire de Forme: Modélisation et Calcul de Structures

Abstract : The range of Shape Memory Alloys offers a variety of mechanical behaviour: shape memory effect, superelasticity, damping... These materials can be used to improve existing technical solutions, but can also be at the origin of new solutions and innovative products. A numerical tool for help to the desing of applications in SMA is developed in this PhD thesis. The work is focused on the thermomechanical coupling and the use of SMAs as actuators. The model of the macroscopic behaviour of SMA developed in this work is based on a study of the thermodynamics of the martensitic phase transformation. It proposes a description of the internal state of the material based on an original choice of the internal variables: the volumic fraction of martensite and the mean transformation strain of the martensite. The model has been validated with a characterization campaign of the mechanical and thermal behaviour of the material. The adopted macroscopic point of view authorizes a reasonable use of the model within the finite element method. The numerical work of integration of the model led to a robust and effective algorithm adapted to the structural analysis.
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Submitted on : Thursday, September 9, 2010 - 2:48:45 PM
Last modification on : Wednesday, March 24, 2021 - 10:34:02 AM
Long-term archiving on: : Friday, September 10, 2010 - 4:19:38 PM


  • HAL Id : pastel-00001444, version 1


Bertrand Peultier. Alliages à Mémoire de Forme: Modélisation et Calcul de Structures. Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2005. Français. ⟨NNT : 2005ENSAM0012⟩. ⟨pastel-00001444⟩



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