Environmental Engineering Reference
In-Depth Information
(a)
(b)
￿ ￿ ￿ ￿ ￿ ￿
1. 9 (a) Beach marks and (b) fatigue striations on the fracture surface
failed under fatigue.
are characteristics of stage II crack propagation and the separation between
striations depends on the stress range and frequency of loading. The total
number of cycles to failure can be estimated as follows from Equations 1.15
and 1.16:
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