Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 26, Issue 11, Pages 1225-1239Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2004.02.007
Keywords
fatigue crack closure; semi-circular crack; semi-elliptical crack; surface crack; crack shape development
Ask authors/readers for more resources
Finite element technique has been widely used in 2-D fatigue crack closure problems for almost three decades. However, the reported 3-D surface crack closure results obtained from this technique are scarce. One possible cause could be the meshing difficulty. In the present study, meshing issues are discussed. Subsequently, both semi-circular and semi-elliptical crack closure behaviors at various loading conditions are calculated. The calculated results show that the closure and opening phenomena of surface cracks are caused by two types of plastic wake, that is, the near-surface type and the interior region type. In the stress ratio R = 0 cases, the final crack-front opening always takes place at the free surface. However, the calculated R = -1 results show a different crack opening sequence. In the semi-elliptical crack results, along the crack front, different opening levels are found at various locations of the interior region. Finally, surface crack shape development incorporating the crack closure effect is also briefly discussed. (C) 2004 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available