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Fatigue life of components with two types of defects
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).ORCID iD: 0000-0001-8068-2360
2009 (English)In: 12th International Conference on Fracture 2009, ICF-12, 2009, 2243-2252 p.Conference paper, Published paper (Refereed)
Abstract [en]

In design against fatigue with models that take defects into account, most attention is paid to the largest defects. Medium-sized defects, however, are seldom considered as potential sites of failure. In this paper, a model material is studied, containing a substantial proportion of medium-sized defects. The influence of their distributions has been investigated, using FCG computations. These computations were performed as post-processing of FE-results, using a modified Paris law. It is shown that the medium-sized defects can cause fatigue failure, given that there is a relatively large region of intermediate stresses. Further, it is shown that the statistical distributions used for describing the defects have a clear influence on the fatigue life of a component. The effects of removing the largest defects, or reducing the density of the defects, are studied as well.

Place, publisher, year, edition, pages
2009. 2243-2252 p.
Keyword [en]
Fatigue failures, Intermediate stress, Large regions, Model materials, Paris law, Post processing, Potential sites, Statistical distribution, Fracture, Fatigue of materials
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-151981Scopus ID: 2-s2.0-84869807039ISBN: 978-161738227-7 (print)OAI: oai:DiVA.org:kth-151981DiVA: diva2:749156
Conference
12th International Conference on Fracture 2009, ICF-12, 12 July 2009 through 17 July 2009, Ottawa, ON, Canada
Note

QC 20140923

Available from: 2014-09-23 Created: 2014-09-23 Last updated: 2014-09-23Bibliographically approved

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