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Weighted error criterion to evaluate strain-fatigue life prediction methods
, , M. Sathya Prasad
Published in
2011
Volume: 33
   
Issue: 5
Pages: 727 - 734
Abstract
Experimental determination of strain-fatigue life curve is expensive considering the time and effort involved. Several empirical relations based on monotonic tensile properties and/or hardness is available for estimating strain-fatigue life properties. Existing criteria to evaluate the accuracy of these empirical relations are limited by the data points in the strain-fatigue life curve. A new criterion based on the prediction errors of fatigue constants is proposed to overcome the limitation. Around eight prediction methods are evaluated for two hundred twenty-six steel grades from literature using the existing and the proposed criteria. It is observed that the conclusions from the new criterion are more reliable than the existing criteria. © 2010 Elsevier Ltd. All rights reserved.
About the journal
JournalInternational Journal of Fatigue
ISSN01421123
Open AccessNo
Concepts (16)
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    DATA POINTS
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    Empirical relations
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    ERROR CRITERION
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    Experimental determination
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    Fatigue life
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    FATIGUE LIFE CURVE
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    Fatigue life prediction
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    LEAST SQUARE FITS
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    PREDICTION ERRORS
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    Prediction methods
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    SCATTER BAND
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    STEEL GRADES
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    WEIGHTED ERROR CRITERION
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    Forecasting
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    Rating
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    Fatigue of materials