A Study of Fatigue Fracture Properties of High Strength Steel in High and Extremely High Cycle Fatigue Regions based on Experimental and Simulation Methods

In order to clarify experimentally the damage process for the high strength steel in high and extremely high cycle regions and to propose a simulation model based on a new approach, rotating bending fatigue tests were performed with special focus on the effect of the role of the inclusion on the fat...

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Bibliographic Details
Published inTransactions of the Japan Society of Mechanical Engineers Series A Vol. 69; no. 679; pp. 617 - 625
Main Authors FUKAZAWA, Kengo, OKABE, Tomonaga, KOMOTORI, Jun, SHIMIZU, Masao
Format Journal Article
LanguageJapanese
Published The Japan Society of Mechanical Engineers 2003
Subjects
Fatigue
Fish-Eye Failure
Fracture Mechanism
High Cycle Fatigue
High Strength Steel
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Summary:In order to clarify experimentally the damage process for the high strength steel in high and extremely high cycle regions and to propose a simulation model based on a new approach, rotating bending fatigue tests were performed with special focus on the effect of the role of the inclusion on the fatigue properties of high strength steel. The transition of fatigue crack initiation site from surface inclusion to internal one was observed with decreasing stress amplitude. The simulation model was proposed on the basis of the concept of a risk competition of defects, in which a virtual specimen has been constructed in the computer program and all inclusions were assumed to be equivalent to a crack origin. The results of the simulation were almost in accordance with the experimental results, and it was shown that this model could make the prediction of fatigue life of high strength steel in high and extremely high cycle regions.
ISSN:0387-5008
1884-8338
DOI:10.1299/kikaia.69.617