Effects of Replication on Measured S-N Curves of Metals

Kai Duan; Aiden G. Beer; Richard E. Clegg

doi:10.4028/www.scientific.net/AMR.275.35

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 275Effects of Replication on Measured S-N Curves of...

Effects of Replication on Measured S-N Curves of Metals

Abstract:

Replication, or repeated tests at the same stress amplitude, is used to provide statistical confidence in life data during the development of S-N curves. This paper discusses the effects of replication on the measurement of S-N curves and presents an alternative to traditional replication methods for the determination of S-N curves, particularly for the development of preliminary S-N curves. Using specimens made out of the extruded bars of a magnesium alloy, it is demonstrated that the S-N curve estimated using the data from non-replication tests is almost same as that from replication tests. The advantage of using non-replication fatigue tests is that it uses fewer specimens, in this instance, only half of that required for 50% replication fatigue test, to achieve the same estimation as that of the replication fatigue tests. Another advantage of using non-replication fatigue tests is that it can detect the non-linearity using limited specimens.

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Periodical:

Advanced Materials Research (Volume 275)

Pages:

35-38

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.275.35

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Online since:

July 2011

Authors:

Kai Duan, Aiden G. Beer, Richard E. Clegg

Keywords:

(Percent) Replication, Extruded Magnesium, Fatigue, S-N Curve, Statistical Analysis

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