A COMPARISON OF A DISCRETE DISLOCATION MODEL AND A CONTINUOUS DESCRIPTION OF CYCLIC CRACK-TIP PLASTICITY

Authors
RIEMELMOSER FO PIPPAN R STUWE HP
Citation
Fo. Riemelmoser et al., A COMPARISON OF A DISCRETE DISLOCATION MODEL AND A CONTINUOUS DESCRIPTION OF CYCLIC CRACK-TIP PLASTICITY, International journal of fracture, 85(2), 1997, pp. 157-168
Citations number
18
Journal title
International journal of fracture → ACNP
ISSN journal
03769429
Volume
85
Issue
2
Year of publication
1997
Pages
157 - 168
Database
ISI
SICI code
0376-9429(1997)85:2<157:ACOADD>2.0.ZU;2-H
Abstract
Crack tip plasticity is simulated as motion of discrete dislocations. The results of the dislocation model are compared with the predictions of a continuous description of crack tip plasticity in the case of a stationary mode I fatigue crack. It is shown that both the dislocation model and the continuum mechanics lead to the same result at high loa ding levels but they differ significantly for small stress intensity r anges.