Variable amplitude crack growth in notched specimens
2005 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 72, no 18, 2703-2720 p.Article in journal (Refereed) Published
Predictions of variable amplitude fatigue crack growth in notched tensile specimens at an elevated temperature and relative high loads were conducted. The predictions were based on constant amplitude fatigue data and mean crack growth rates were calculated. Crack closure levels were calculated by comparison of crack closure free experimental data obtained with the so called constant K1(max)-method and nominal data. Also, numerical simulations of the closure level throughout the specimens were performed. Although experimental data showed rather large a scatter it was concluded that variable amplitude crack growth rates can be predicted with reasonable agreement using constant amplitude fatigue data. Also, crack growth rates cannot be predicted by LEFM in the inelastic notch affected zone, even if absence of crack closure is assumed.
Place, publisher, year, edition, pages
Oxford: Pergamon Press, 2005. Vol. 72, no 18, 2703-2720 p.
crack closure, variable amplitude, notch, finite element analysis, fatigue crack growth, short fatigue cracks, experiments
Applied Mechanics Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-15162DOI: 10.1016/j.engfracmech.2005.07.001ISI: 000233076000001ScopusID: 2-s2.0-25444457321OAI: oai:DiVA.org:kth-15162DiVA: diva2:333203
ProjectsKonsortium Materialteknik för demonstration och utveckling av termiska energiprocesser: KME-101
FunderSwedish Energy Agency
QC 201005252010-08-052010-08-052016-05-02Bibliographically approved