Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 135, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2020.105560
Keywords
Defect interaction; Small crack; Interaction effect; Non-propagating crack; Fatigue limit
Funding
- Aalto University, School of Engineering
- Academy of Finland [298762]
- Academy of Finland (AKA) [298762, 298762] Funding Source: Academy of Finland (AKA)
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This study investigates the effect of interacting small cracks on the fatigue limits of two types of pure iron of varying strengths and of a bearing steel. The experimental results revealed that although the fatigue limits were essentially controlled by the mechanics of interacting cracks, the non-propagating crack features and the severity of crack coalescence varied greatly among the different materials. In addition, it is demonstrated that the material-independent, analytical, interaction-criterion alone is not sufficient to estimate interaction effects in reality. This research shows that the material effect can be considered in terms of hardness and non-propagating crack size.
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