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A statistical model for fatigue fracture under constant-amplitude cyclic loading

โœ Scribed by R. Arone

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
441 KB
Volume
14
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

A statistical approach to fatigue fracture under constant load is presented. Crack initiation due to detrimentally-acting external factors is considered, with a time-dependent rate assumed for an ensemble of growing stochastically-independent fatigue cracks. For crack increments under cyclic loading, a proportional-effect model is applied. It is shown that at low rates of surface crack initiation and low scatter of the crack increments, the median value of the fracture stress appreciably exceeds the one predicted by the deterministic model, whose estimate is conservative. At high rates and high scatter, the picture is reversed.

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