Description of the kinetics of growth of a fatigue crack on the basis of the criterion of current crack tip opening displacement
β Scribed by A. Ya. Krasovskii; I. S. Pinyak
- Book ID
- 110548076
- Publisher
- Springer
- Year
- 1998
- Tongue
- English
- Weight
- 469 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0039-2316
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π SIMILAR VOLUMES
Using a direct proportionality between the rate of fatigue crack growth and crack opening displacement above a threshold, it is shown that fatigue crack growth data for a wide variety of different materials can be accurately described in terms of the mechanical properties and two material constants
Further resuhs given in the present paper confnm that shallow cracks have larger crack tip opening disp~a~en~ at initiation than deep cracks. This difference in behaviour is shown to be principally caused by the different hydrostatic stresses existing at the tips of shallow and deep cracks. A new me
Critical values of the crack-tip-opening displacement, COD,, are determined on CIIspecimens having different thicknesses and ligament lengths. COD, is determined using the method of stereophotogrammetry with the scanning-electron microscope. The in&nce of specimen geometry on CODi is studied. Criter