Development of Numerical Hydrogen Diffusion-Stress-Crack Growth Simulation System

In this study, we develop a Python-based simulation code for crack growth due to hydrogen embrittlement. A multiphysics numerical model combining stress-assisted hydrogen diffusion, trapping effects, and Paris’ law-based crack propagation is systematically verified for numerical stability and physical plausibility. Specifically, (1) implementation and verification of a stress-driven hydrogen diffusion model, (2) evaluation of mass conservation for lattice and trap hydrogen, (3) crack-tip stress