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Fatigue crack propagation and strain cycling properties

โœ Scribed by Kenneth R. Lehr; H. W. Liu

Publisher
Springer Netherlands
Year
1969
Tongue
English
Weight
625 KB
Volume
5
Category
Article
ISSN
1573-2673

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โœฆ Synopsis

A mechamcal model of fatigue crack propaganon was studied. It is hypothestzed that propagation is caused by cumulative damage due to strata cycling of the material at a crack tip. With Miner's cumulative damage law and Manson and CofI'm's strain cycle fatigue law, crack propagation rate of a material can be calculated. The calculated values are compared with data on 7075-T6 Al, 2024-T4 A1, AM 350 stainless steel, and 18 Ni maraging steel. The calculated and experimental values correlate reasonably well. The results indicate that fatigue crack propagation resistance of a material as related to its capability to sustain strain cycling, ~.e. its cyclic ductility.

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