Abstract
A generic, versatile and unified platform serving for the continuum-level simulation of hydrogen embrittlement (HE) is proposed. The complete Gurson model (CGM), designed to predict ductile failure by voiding, is extended to the CGM+ by incorporating a decohesion failure criterion. Hydrogen enhanced plasticity is accounted for through acceleration of the voiding process while hydrogen induced decohesion is realized by a degradation of the decohesion threshold. In such way, hydrogen induced synergistic action of plasticity and decohesion is unified in one predictive model, referred to as H-CGM+. The interplay between plasticity-dominated and decohesion-dominated failure modes driven by varied conditions, i.e. hydrogen concentration, trapping, and material’s microstructure are well captured. The platform may serve as a basis for interpretation of laboratory experiments and enable the transferability of the laboratory results to the integrity assessment of engineering components in hydrogen environment.