期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 152, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2021.106418
关键词
Fatigue crack growth; Life prediction; Micromechanics; Short cracks
Research shows that microstructural short crack (MSC) growth significantly affects the fatigue lifetime of steels. Using finite element simulations with crystal plasticity, a MSC model for ferritic steel EN 1.4003 was described, showing the feasibility for lifetime prediction through appropriate calibration strategies.
Microstructural short crack (MSC) growth profoundly influences the fatigue lifetime of steels. For finite element simulations with crystal plasticity, a MSC model for industrial application is described for the ferritic steel EN 1.4003. As transgranular cracking is dominant in the early fatigue stages for this material, intergranular crack growth is excluded. Crack data from micro fatigue specimen is used to validate simulated crack paths. With a manual prescription of the crack initiation site, a substantial agreement between the predicted and experimental crack paths is revealed. Using an appropriate calibration strategy for the parametrization of the MSC model, the feasibility for lifetime prediction is also shown.
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