A cycle-by-cycle fatigue damage analysis of biaxial composite structures utilizing acoustic emission

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Abstract

In the present work, a fatigue damage analysis of biaxial Carbon Fibre Reinforced Polymer (CFRP) specimens loaded at two different stress levels and a fatigue ratio, R=0.1, was performed. A cycle-by-cycle approach was used, utilizing results from Acoustic Emission (AE) measurements. The aim was to investigate the influence of the applied maximum stress level on the fatigue damage accumulation process and to examine the hypothesis that damage growth occurs in a portion of a load cycle. It was found that the damage process, for the specimens loaded in lower applied stress, was gradually increased where different damage mechanisms evolved slowly towards the end of life. On the other hand, for the specimens loaded in higher applied stress, the damage process accumulated evenly and several failure mechanisms occurred in parallel at a very early stage of the fatigue life. Finally, for both loading cases, a load threshold was found, below which, there was no damage growth, supporting the hypothesis of this work.

Original languageEnglish
Title of host publicationECCM 2018 - 18th European Conference on Composite Materials
PublisherApplied Mechanics Laboratory
ISBN (Electronic)9781510896932
Publication statusPublished - 2020
Event18th European Conference on Composite Materials, ECCM 2018 - Athens, Greece
Duration: 24 Jun 201828 Jun 2018

Conference

Conference18th European Conference on Composite Materials, ECCM 2018
CountryGreece
CityAthens
Period24/06/1828/06/18

Keywords

  • Acoustic emission
  • Cycle-by-cycle analysis
  • Fatigue damage accumulation

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  • Cite this

    Zarouchas, D. S., Pascoe, J. A., & Alderliesten, R. C. (2020). A cycle-by-cycle fatigue damage analysis of biaxial composite structures utilizing acoustic emission. In ECCM 2018 - 18th European Conference on Composite Materials Applied Mechanics Laboratory.