Simulation of ductile-to-brittle transition combining complete Gurson model and CZM with application to hydrogen embrittlement

• Ductile-to-brittle transition is simulated combining complete Gurson model and CZM. Brittle fracture only occurs when the ratio between cohesive strength yield below a critical value. Hydrogen embrittlement studied using this numerical framework hydrogen concentration revealed. A general simulation for modelling ductile-to-brittle in metals proposed. The method combines zone model, which brings ductile brittle mechanisms into one play. We found that of failure mode result competition due to micro-void growth coalescence zone. It dependent on material; This generic rule can be used rationalize various scenarios featured by transition, such as low temperature embrittlement. As an application framework, simulated. revealed has achieved order trigger fracture, consistent with many experimental observations.