Stochastic modeling of fatigue crack growth

B F Spencer, J. Tang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new lognormal fatigue crack propagation model has been presented in which a two-dimensional state vector has been employed to introduce experimentally observed history dependence of fatigue crack growth. Markov process theory has been used to formulate a well-posed boundary-value problem for the statistics of the random time to reach a critical crack size conditional on the initial flaw size. A robust Petrov-Galerkin finite element method was then utilized for the solution of the boundary value problem. In the examples, the commonly used power-law crack propagation model is employed for simplicity, however, more complex models could have been employed with little additional effort. Finally, excellent correlation with the experimental results was found.

Original languageEnglish (US)
Title of host publicationProbab Methods Civ Eng Proc 5th ASCE Spec Conf
PublisherPubl by ASCE
Pages25-28
Number of pages4
ISBN (Print)0872626598
StatePublished - Dec 1 1988
Externally publishedYes
EventProbabilistic Methods in Civil Engineering, Proceedings of the 5th ASCE Specialty Conference - Blacksburg, VA, USA
Duration: May 25 1988May 27 1988

Publication series

NameProbab Methods Civ Eng Proc 5th ASCE Spec Conf

Other

OtherProbabilistic Methods in Civil Engineering, Proceedings of the 5th ASCE Specialty Conference
CityBlacksburg, VA, USA
Period5/25/885/27/88

ASJC Scopus subject areas

  • Engineering(all)

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