The phenomenon of fatigue crack closure has attracted continued interest over recent years. This paper concerns itself with one aspect of the phenomenon namely the effects of a single asperity on the crack face close to the crack tip and under dominantly plane strain Mode 1 loading conditions. The m
A model for crack closure
β Scribed by D.L. Chen; B. Weiss; R. Stickler
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 1014 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0013-7944
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β¦ Synopsis
The current status of the knowledge about the fatigue crack closure effect is briefly reviewed. 494 D.L. CHEN et al. AK~ldconv) AK,~ Aa AO'~h 2 V Β’7 a,c,(6) O'closed {)'max O'mi n O~min,aΒ’l flop O'll
conventional effective stress intensity range, Km,,~ -K,.r shielding stress intensity range externally applied stress range maximum shielding stress range shielding stress range for a given COD parameter correlating macroscopic with microscopic quantities Poisson's ratio externally applied stress actual stress sensed by the crack tip for a given COD externally applied stress corresponding to fully closed condition maximum externally applied stress minimum externally applied stress actual stress transmitted to the crack tip at the minimum externally applied stress opening stress stress distribution ahead of the crack tip along the crack plane.
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The plane strain, fatigue crack problem in which fracture surface asperities prevent closure is considered. A model in which closure contact can develop on a distribution of asperities is introduced. A comparison of closure behavior for one and for two asperities is made, and the effects of variatio
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