Fatigue Reliability of Casted Wind Turbine Components Due to Defects

Hesam Mirzaei Rafsanjani, John Dalsgaard Sørensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

1 Citation (Scopus)

Abstract

Manufacturing of casted components often leads to some (small) defects that are distributed in the volume of the components. These defects are different according to their size, type, orientation and etc. In this paper a probabilistic model is proposed for modeling manufacturing defects and their influence on the fatigue strength of the components. The fatigue life is dependent on the number, type, location and size of the defects in the component and is therefore quite uncertain and needs to be described by stochastic models. In this paper, the Poisson distribution for modeling of defects of component are considered and the surface and sub-surface defects categorized. Furthermore, a model to estimate the probability of failure by fatigue due to the defects is proposed. This model is used to estimate the failure location of component and it is compared to models of defect distributions and locations. Further, an upper bound of reliability is estimated using a modified Miner rule approach for fatigue damage accumulation.
Original languageEnglish
Title of host publicationProceedings of 12th International Conference on Applications of Statistics and Probability in Civil Engineering
EditorsTerje Haukaas
Number of pages8
PublisherCivil Engineering Risk and Reliability Association
Publication date2015
Article number248
DOIs
Publication statusPublished - 2015
EventICASP12: 12th International Conference on Applications of Statistics and Probability in Civil Engineering - Vancouver, Canada
Duration: 12 Jul 201515 Jul 2015
Conference number: 12

Conference

ConferenceICASP12
Number12
CountryCanada
CityVancouver
Period12/07/201515/07/2015

Keywords

  • Casted components
  • Defects
  • Fatigue reliability
  • Poisson distribution

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