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- Title
Analysis of edge crack behaviour influenced by non-symmetrical contact tractions and bulk tension.
- Authors
Kim, H.‐K.
- Abstract
This paper analyses a crack growth behaviour, which is initiated from the contact edge between a square punch with rounded edges and a half plane. Investigated are the influences of the contact profile, magnitude of the bulk tension and, crack obliquity, in particular, misalignment between the punch and half plane on the variation of the stress intensity factors KI and KII during the crack growth. The misalignment is simulated by a tilting of the punch. A partial slip regime is considered for the contact shear force to accommodate a general fretting fatigue condition. It was found that a crack closure occurs if only the contact forces are applied. The crack grows longer before it is closed if the punch is tilted (clockwise, in this paper) such that it initiates at the opposite site with respect to the direction of tilting. The closure phenomenon disappears when the bulk tension is added and exceeds a certain magnitude, which significantly depends on not only the contact profile but also the degree and direction of tilting. Provided are the lowest values of the bulk tensile stress due to a fatigue load necessary to extend the crack without a closure for each condition of the contact profile and misalignment. This may be used as a design guideline to restrain the contact-induced failure.
- Subjects
FATIGUE crack growth; TENSION loads; FRETTING corrosion; GUIDELINES; CRACK closure
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2015, Vol 38, Issue 5, p551
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.12260