Numerical computation of the energetic criterion at isothermal and thermal-mechanical cyclic tests under generalized plasticity of the F17TNb stainless steel

Nader Haddar (1) , Y. Kchaou (1) , Alain Köster (2)

1 ENIS - École Nationale d'Ingénieurs de Sfax | National School of Engineers of Sfax
2 CDM - Centre des Matériaux

The aim of this work is to investigate the energetic integral J criterion in generalized plasticity of the F17TNb at isothermal and Thermal Mechanical Fatigue (TMF) tests using a numerical simulation. An optimization of the constitutive law based on mechanical results was carried out using ABAQUS standard solver. Isothermal tests showed that ΔJ evolution is higher at lower temperature (300 °C) and a has a linear dependence at log-log presentation with da/dN at 300 °C. TMF tests simulation showed that Out of Phase (OP) configuration is more damaging than In Phase (IP) tests. A comparison between OP and isothermal tests highlighted the greater value of ΔJ at isothermal tests.

Mots clés: Energetic criterion; Generalized plasticity; Stainless steel; In phase; Out of phase

Domaines: Matériaux

Nader Haddar, Y. Kchaou, Alain Köster. Numerical computation of the energetic criterion at isothermal and thermal-mechanical cyclic tests under generalized plasticity of the F17TNb stainless steel. Engineering Fracture Mechanics, 2013, 107, pp.1-13. ⟨10.1016/j.engfracmech.2013.03.015⟩. ⟨hal-00841458⟩