Simulation-Based Fatigue Assessment Using the 4R Method in Different Load Conditions

This study integrates computational weld mechanics, cyclic material modeling, and fatigue assessment under constant, overload, and variable-amplitude loading conditions.

SimDec is used for global sensitivity analysis of the simulation model, decomposing fatigue life predictions into interpretable scenarios. The results reveal how cyclic strength parameters and nominal stress levels drive variability in fatigue capacity, demonstrating SimDec’s ability to uncover dominant mechanisms in complex engineering simulations.