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http://dx.doi.org/10.3795/KSME-A.2004.28.6.791

The Prediction of Fatigue Crack Initiation Life of Cylindrical Notch Specimens Using Local Strain Approximation  

Lim, Jae-Yong (한국과학기술원 기계공학과)
Hong, Seong-Gu (한국과학기술원 기계공학)
Lee, Soon-Bok (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.6, 2004 , pp. 791-798 More about this Journal
Abstract
Fatigue crack initiation lives of round cylindrical notch specimen were investigated. Firstly, local strain approximation methods, such as the modified incremental Neuber's rule and the modified incremental Glinka's equivalent strain energy density(ESED) rule, were used to get multiaxial stress and strain state components at the notch tip. Based on the history of local stress and strain, multiaxial fatigue models were used to obtain fatigue crack initiation lives. Because the solution of Neuber's rule and Glinka's ESED rule make the upper and lower bound of local strain approximations, fatigue crack initiation lives are expected to place between life predictions by two local strain approximations. Experimental data were compared with the fatigue crack initiation life prediction results.
Keywords
Fatigue Crack Initiation; Notch; Local Strain Approach; Neuber′s Rule; Glinka′s Equiavalent Strain Energy Density Rule; Replica; Multiaxial Fatigue;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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