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Strain rate sensitivity in superelasticity

Abstract : This paper deals with the influence of martensitic transformation latent heat on the superelastic behaviour modelling. Exothermic and endothermic effects are responsible for a strong evolution on the temperature field inside the material that modifies its mechanical response. This is responsible for a strain rate effect that is taken into account by introducing a coupling equation between the production rate of martensite and the temperature change, into a micro–macro modelling of the superthermoelastic behaviour with the assumption that the temperature field remains uniform but different to the test temperature imposed. Numerical simulations so obtained show a good agreement with experimental results performed on Cu-based superelastic alloys.
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Denis Entemeyer, Etienne Patoor, André Eberhardt, Marcel Berveiller. Strain rate sensitivity in superelasticity. International Journal of Plasticity, Elsevier, 2000, 16 (10-11), pp.1269-1288. ⟨10.1016/S0749-6419(00)00010-3⟩. ⟨hal-02173938⟩

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