Experimental Verification of a Stochastic Fatigue Crack Growth Model

C.C. Ni

doi:10.4028/www.scientific.net/AMR.1120-1121.1419

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1120-1121Experimental Verification of a Stochastic Fatigue...

Experimental Verification of a Stochastic Fatigue Crack Growth Model

Abstract:

The study is focused on the experimental verification of a proposed polynomial stochastic fatigue crack growth model. The model was assumed that the fatigue crack growth rate equals to a deterministic polynomial function multiplied by a stationary lognormal random factor. Compact-tension specimens cut from a 2024-T351 aluminum-alloy plate were used for fatigue crack growth experiments under constant-amplitude loads performed on thirty specimens. The comparison of median crack growth curves was made between analytical and experimental outcomes. For extreme case of lognormal random variable, the comparisons of the fatigue crack growth curve, percentile fatigue crack growth curve, probability of crack exceedance, and distribution function of random time between analytical and experimental results were also investigated.

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Periodical:

Advanced Materials Research (Volumes 1120-1121)

Pages:

1419-1423

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.1419

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Online since:

July 2015

Authors:

C.C. Ni*

Keywords:

Compact-Tension Specimen, Fatigue Crack Growth Experiment, Stochastic Model

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References

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