Scale Transition in Finite Element Simulations of Hydrogen–Plasticity Interactions

Modeling hydrogen dragging by mobile dislocations in finite element simulations

“…The implementation in Abaqus of the TTD system (equation ( 17)) is made based on User Subroutine development, following the works presented in previous studies (see [18,32,[42][43][44][45] for further details). It is furthermore needed to include in Abaqus multi-diffusion capabilities following the scheme presented in [46]; all of the problems are simultaneously solved (mechanical, diffusion, trapping, dragging).…”

“…This approach was applied to the simulation of hydrogen repartition ahead a crack tip in small scale yielding with isotropic elastoplastic material, as in previous works [10,11,31], they showed through a parametric study the effect of the hydrogen transport by dislocation both for bcc and fcc materials, which permits to improve the simulation of hydrogen transport. This approach has been extended to crystal plasticity scale [32,33] to add the influence of polycrystalline texture on the overall hydrogen transport.…”

Effect of transient trapping on hydrogen transport near a blunting crack tip

“…The effect of that extra term was analyzed on the same SSY configuration to underline the consequences on hydrogen repartition ahead of a crack tip under a mode I loading. This modified equation has been used in various papers based on finite element computations to describe hydrogen transport in mechanically loaded structures using both isotropic and crystal plasticity (see, [18][19][20][21]). Later, Kanayama et al [16] investigated the effect of transient trapping compared to Oriani's equilibrium on the hydrogen repartition in this SSY configuration, using the ADVENTURE finite element software [22].…”