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On the geometry of fatigue crack closure
Author(s) -
Stüwe HeinPeter,
Pippan Reinhard,
Shan Guo Xin
Publication year - 1992
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199200537
Subject(s) - crack closure , flank , materials science , stress intensity factor , amplitude , closure (psychology) , stress (linguistics) , fatigue testing , mechanics , structural engineering , stress concentration , geometry , composite material , mathematics , fracture mechanics , engineering , physics , optics , linguistics , philosophy , sociology , anthropology , economics , market economy
Long fatigue cracks frequently grow at a much lower rate than short cracks because they are closed during part of the stress cycle. The critical crack length for the transition from “short” to “long” depends on the amplitude of stress intensity Δ K and on the stress ratio R . This dependence is explained using a numerical study of the crack flank contour.