Comments on “A physical model and constitutive equations for complete characterization of S-N fatigue behavior of metals”

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DOIResolve DOI: http://doi.org/10.1016/j.scriptamat.2017.01.014
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TypeArticle
Journal titleScripta Materialia
ISSN1359-6462
Volume133
Pages113
Subjectfatigue crack initiation; fatigue crack nucleation; s-n curve
AbstractIn a recent paper published in Acta Materialia [Ravi Chandran, Acta Materialia 121 (2016) 85–103], the author assumed that crack initiates instantaneously to a size proportional to the applied stress minus the fatigue endurance limit over the range between the fatigue limit and the ultimate strength of the material. However, this relationship has never been proven experimentally. It contradicts to the understanding of fatigue crack nucleation from accumulation of persistent slip bands, which is a process, not an instantaneous event, as supported by numerous experimental observations. Therefore, the proposed S-N curve relationship based on instantaneous “crack initiation” should not be deemed as a “physical model”.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number23002404
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Record identifier88291aa9-1466-4ad2-94a7-04c471930c14
Record created2017-10-27
Record modified2017-10-27
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