Predicting fatigue damage in composites: a Bayesian framework

Manuel Chiachío, Juan Chiachío, Guillermo Rus, James L. Beck

Research output: Contribution to journalArticle

22 Citations (Scopus)
21 Downloads (Pure)

Abstract

Modeling the progression of damage in composites materials is a challenge mainly due to the uncertainty in the multi-scale physics of the damage process and the large variability in behavior that is observed, even for tests of nominally identical specimens. As a result, there is much uncertainty related to the choice of the class of models among a set of possible candidates for predicting damage behavior. In this paper, a Bayesian prediction approach is presented to give a general way to incorporate modeling uncertainties for inference about the damage process. The overall procedure is demonstrated by an example with test data consisting of the evolution of damage in glass–fiber composite coupons subject to tension–tension fatigue loads. Results are presented for the posterior information about the model parameters together with the uncertainty associated with the model choice from a set of plausible fatigue models. This approach confers an efficient way to make inference for damage evolution using an optimum set of model parameters and, in general, to treat cumulative damage processes in composites in a robust sense.
Original languageEnglish
Pages (from-to)57-68
Number of pages12
JournalStructural Safety
Volume51
Early online date7 Jul 2014
DOIs
Publication statusPublished - 30 Nov 2014

Keywords

  • FRP composites
  • fatigue
  • markov chains
  • Bayesian inverse problem
  • model class selection

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