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A fracture mechanics analysis of ultrasonic fatigue
Brown Boveri Research Centre.
Brown Boveri Research Centre.ORCID iD: 0000-0002-0307-8917
1982 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 16, no 3, 365-371 p.Article in journal (Refereed) Published
Abstract [en]

The method of ultrasonic fatigue finds increasing interest in materials science. Especially, fatigue crack growth rates near the threshold stress intensity range, Δ”K0, can be determined with this method in reasonable times providing no frequency and corrosion effects exist. But for an accurate application of this technique it is necessary to improve the testing systems and also the determination of the dynamic cyclic stress intensity range, Δ”K. In this paper, fatigue crack growth experiments at ultrasonic frequencies with different mean stresses and also the calculation of the dynamic stress intensity range with finite elements are treated. On this basis fatigue crack growth curves at room temperature of the alloys Hastelloy X and IN 800 were measured and compared with results obtained at low frequencies. No significant influence of frequency could be found in these materials.

Place, publisher, year, edition, pages
1982. Vol. 16, no 3, 365-371 p.
Keyword [en]
FRACTURE MECHANICS
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-25468ISI: A1982NG55500004OAI: oai:DiVA.org:kth-25468DiVA: diva2:358716
Note
QC 20101025Available from: 2010-10-25 Created: 2010-10-25 Last updated: 2017-12-12Bibliographically approved

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Gudmundson, Peter

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