Fatigue life of components with two types of defects
2009 (English)In: 12th International Conference on Fracture 2009, ICF-12, 2009, 2243-2252 p.Conference paper (Refereed)
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.
Fatigue failures, Intermediate stress, Large regions, Model materials, Paris law, Post processing, Potential sites, Statistical distribution, Fracture, Fatigue of materials
Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-151981ScopusID: 2-s2.0-84869807039ISBN: 978-161738227-7OAI: oai:DiVA.org:kth-151981DiVA: diva2:749156
12th International Conference on Fracture 2009, ICF-12, 12 July 2009 through 17 July 2009, Ottawa, ON, Canada
QC 201409232014-09-232014-09-232014-09-23Bibliographically approved