Advanced modeling and numerical simulations for the thermo-chemico-mechanical behaviour of materials with damage and hydrogen, based on the thermodynamics of irreversible processes

Kanssoune Saliya (1) , Benoît Panicaud (1) , Carl Labergere (1)

1 LASMIS - Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée

In the present article, we propose a fully coupled thermo-elasto-plastic-damage theory, which includes both kinematic and isotropic hardening, and also accounts for hydrogen diffusion in metals. This theory is based on the thermodynamics of irreversible processes under small deformation hypothesis and suppose that hydrogen diffuses in both normal interstitial lattice sites and trapping sites. This model is implemented into Abaqus/Standard by developing a UEL user subroutine and using an “assumed strain” method. A numerical application is performed to simulate hydrogen diffusion in a metallic welded joint submitted to a long-time severe environment at constant temperature.

Domains: Mechanics of materials [physics.class-ph]

Kanssoune Saliya, Benoît Panicaud, Carl Labergere. Advanced modeling and numerical simulations for the thermo-chemico-mechanical behaviour of materials with damage and hydrogen, based on the thermodynamics of irreversible processes. Finite Elements in Analysis and Design, 2019, 164, pp.79-97. ⟨10.1016/j.finel.2019.06.006⟩. ⟨hal-02276036⟩