An energy-based prognostic framework to predict fatigue damage evolution in composites

Juan Chiachio, Manuel Chiachio Ruano, Abhinav Saxena, Guillermo Rus, Kai Goebel

Research output: Contribution to conferenceProceeding

21 Citations (Scopus)

Abstract

In this work, a prognostics framework to predict the evolution of damage in fiber-reinforced composites materials under fatigue loads is proposed. The assessment of internal damage thresholds is a challenge for fatigue prognostics in composites due to inherent uncertainties, existence of multiple damage modes, and their complex interactions. Our framework, considers predicting the balance of release strain energies from competing damage modes to establish a reference threshold for prognostics. The approach is demonstrated on data collected from a run-to-failure tension-tension fatigue experiment measuring the evolution of fatigue damage in carbon-fiber-reinforced polymer (CFRP) cross-ply laminates. Results are presented for the prediction of expected degradation by micro-cracks for a given panel with the associated uncertainty estimates.
Original languageEnglish
Pages363-371
Number of pages9
Publication statusPublished - 2013
EventProceedings of the Annual Conference of the Prognostics and Health Management Society 2013 - New Orleans, United States
Duration: 7 Oct 2013 → …

Conference

ConferenceProceedings of the Annual Conference of the Prognostics and Health Management Society 2013
CountryUnited States
CityNew Orleans
Period7/10/13 → …

Keywords

  • prognostics framework
  • fiber-reinforced composites
  • internal damage thresholds
  • reference threshold for prognostics
  • carbon-fiber-reinforced polymer (CFRP)
  • micro-cracks
  • uncertainty analysis
  • cross-ply laminate

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