✦ LIBER ✦

Fatigue growth of surface cracks in bending

✍ Scribed by L.H. Burck

Publisher: Elsevier Science
Year: 1977
Tongue: English
Weight: 495 KB
Volume: 9
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(77)90031-5

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✦ Synopsis

Absbwt-A simple procedure for calculating the fatigue crack propagation lifetimes of surface-initiated part-through cracks in bending is discussed and agreement is obtained with previously reported experimental data. It is shown that a realistic fatigue analysis of these cracks must include an explicit determination of crack depth as a function of surface length and that, in general, the depth-to-length ratio varies with crack length, crack nucleus geometry and with the stress intensity factor exponent in the Paris growth rate relationship. Numerical results are presented for some typical situations.

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