TY - GEN
T1 - The significance of plastic zone growth under cyclic loading and crack opening/closing model in fatigue crack propagation
AU - Toyosada, Masahiro
AU - Gotoh, Koji
PY - 2005
Y1 - 2005
N2 - Fatigue cracks remain closed at lower loading level during a part of load cycle even though a tension-to-tension loading is applied. The crack closure plays a role to obstruct the generation and growth of compressive plastic zone during unloading. Cyclic plastic work, which corresponds to an irreversible energy consumed in a cracked body is generated ahead of a crack, is required as a fatigue crack driving force. The amout of cyclic plasticity is reduced by a crack closure. The crack opening/closing model based on the Dugdale model under arbitrary stress distributions for a through thickness straight crack is proposed and the fatigue crack growth under various loadings is investigated.
AB - Fatigue cracks remain closed at lower loading level during a part of load cycle even though a tension-to-tension loading is applied. The crack closure plays a role to obstruct the generation and growth of compressive plastic zone during unloading. Cyclic plastic work, which corresponds to an irreversible energy consumed in a cracked body is generated ahead of a crack, is required as a fatigue crack driving force. The amout of cyclic plasticity is reduced by a crack closure. The crack opening/closing model based on the Dugdale model under arbitrary stress distributions for a through thickness straight crack is proposed and the fatigue crack growth under various loadings is investigated.
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U2 - 10.4028/0-87849-964-4.95
DO - 10.4028/0-87849-964-4.95
M3 - Conference contribution
AN - SCOPUS:35148861101
SN - 0878499644
SN - 9780878499649
T3 - Materials Science Forum
SP - 95
EP - 102
BT - Materials Structure and Micromechanics of Fracture IV, MSMF-4 - Proceedings of the Fourth International Conference on Materials Structure and Micromechanics of Fracture
PB - Trans Tech Publications Ltd
T2 - 4th International Conference on Materials Structure and Micromechanics of Fracture, MSMF-4
Y2 - 23 June 2004 through 25 June 2004
ER -