A cycle-jump acceleration method for the crystal plasticity simulation of high cycle fatigue of the metallic microstructure

For metallic materials, high-cycle fatigue life is sensitive to underlying microstructure features including sec-ondary phases, textures, grains morphology, etc. The traditional, data-based safe-life approaches for modeling fatigue don't explicitly consider the microstructure and can't guide study in microstructure modification for improved fatigue property. Crystal plasticity-based simulation provides increased model fidelity at the expense of immense computation time, making it inapplicable for high cycle fatigue. In this work, an acceleration method based on cycle-jump approach (Lesne and Savalle, 1989) was developed for microstructure-based high-cycle FE simulation using crystal plasticity constitutive-model. This method demonstrated high efficiency in benchmark tests of various conditions.

Automated summary

High-cycle fatigue life in metallic materials is affected by microstructure features, but traditional data-based approaches lack consideration for microstructure and crystal plasticity-based methods are computationally expensive. In this study, an acceleration method based on the cycle-jump approach was developed for efficient microstructure-based high-cycle fatigue finite element simulation.