Acta Mechanica Solida Sinica

, Volume 30, Issue 1, pp 27–37 | Cite as

A unified plasticity methodology for rate- and temperature-sensitive alloys exhibiting a non-linear kinematic hardening behavior

  • Jacques Luk-Cyr
  • Daniel Paquet
  • Jacques Lanteigne
  • Henri Champliaud
  • Aurelian Vadean
Article

Abstract

In this paper, a novel unified plasticity methodology is proposed to allow the coupling of rate- and temperature-sensitivity of engineering alloys as well as the non-linear kinematic hardening behavior often observed during cyclic loading. The proposed methodology is general in the sense that an arbitrary constitutive model may be chosen for the viscoplastic part, as well as the cyclic part. We adapt our model with a physically-motivated viscoplasticity flow rule and a nonlinear kinematic hardening model. In contrast with other unified plasticity models, the simplified theory involves few material parameters that can be readily calibrated from standard mechanical tests. The capabilities of the proposed theory are demonstrated for a hot rolled annealed 304L stainless steel supplied by Vimetal Peckover. The model is tested with stress-strain curves obtained from standard tensile and cyclic uniaxial tests at various strain amplitudes and strain-rates, and good accuracy of the response is obtained for strains up to 15%, within a temperature range of 293–673 K. We note that the cyclic plasticity model in our adapted theory can be readily enhanced with ratchetting, mean stress relaxation, strain amplitude history, Masing effects or other complex capabilities.

Keywords

Unified plasticity Constitutive behavior Viscoplasticity Non-linear kinematic hardening Stainless steels 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2014

Authors and Affiliations

  • Jacques Luk-Cyr
    • 1
  • Daniel Paquet
    • 2
  • Jacques Lanteigne
    • 2
  • Henri Champliaud
    • 3
  • Aurelian Vadean
    • 1
  1. 1.Department of Mechanical EngineeringEcole Polyechnique de MontrealMontreal, QCCanada
  2. 2.Institut de recherche d’Hydro-QuebecVarennes, QCCanada
  3. 3.Department of Mechanical EngineeringEcole de technologie superieureMontreal, QCCanada

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