Determination Method of a Proper Small-Load-Omitting Criterion Based on the Extreme Load

Zhi Qiang Xu

doi:10.4028/www.scientific.net/AMR.694-697.278

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Determination Method of a Proper Small-Load-Omitting Criterion Based on the Extreme Load
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 694-697Determination Method of a Proper...

Determination Method of a Proper Small-Load-Omitting Criterion Based on the Extreme Load

Abstract:

A crucial step to obtain a reliable fatigue life prediction is to determine a proper small load threshold below which the cycles at small loads or stresses with high frequency causing little fatigue damage are truncated from the original load time history. By taking both the peak over threshold theory and the endurance limit threshold into account, a proper small load threshold is proposed in this paper. The optimal threshold should be high enough to remove the high-frequency small cycles and low enough to minimize the loss of the fatigue damage which maybe be truncated by the empirical small-load omitting threshold. Based on this proper threshold, the fatigue life prediction will be more reliable.

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Periodical:

Advanced Materials Research (Volumes 694-697)

Pages:

278-283

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.694-697.278

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Online since:

May 2013

Authors:

Zhi Qiang Xu*

Keywords:

Extreme Load, Load Spectrum, Small-Load-Omitting Criterion, Threshold Estimation

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