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Crack initiation governs high cycle fatigue life and is susceptible tomicrostructural details. While corresponding microstructure-sensitive modelsare available, their validation is difficult. We propose a validation frameworkwhere a fatigue test is mimicked in a sub-modeling simulation by embedding themeasured microstructure into the specimen geometry and adopting theexperimental boundary conditions. Exemplary, a phenomenological crystalplasticity model was applied to predict deformation in ferritic steel(EN1.4003). Hotspots in commonly used fatigue indicator parameter maps arecompared with damage segmented from micrographs. Along with the data, theframework is published for benchmarking future micromechanical fatigue models.

Micromechanical fatigue experiments for validation of microstructure-sensitive fatigue simulation models