Experimental Investigation of the Damage at the Tip of Tunnelling Crack in Glass Fibre Composites

Ashish Kumar Bangaru*, Bent F. Sørensen, Lars Pilgaard Mikkelsen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

The development of a distinct damage mode from the existing damage in composite laminates used in wind turbine blades is not fully understood; thus making it difficult to elucidate the event of chain of different failure mechanisms. In this paper, an experimental analysis was carried out on glass fibre composite laminate with the layup [0/60/0/-60]s subjected to cyclic loading in order to document the damage subsequent to early stage of intralaminar matrix cracks, also referred as tunnelling cracks in off-axis plies 60˚/-60˚. The staining method coupled with X-ray Computed Tomography (CT) scan allowed in visualizing tunnelling crack propagation into the pure matrix region of 0˚ UD ply locally sandwiched between thin (60˚) and thick (-60˚) plies after 30,000 cycles. While close to the edge, due to edge effect phenomenon the tunnelling crack from the backing bundles resulted in considerable fibre breaks in 0˚ UD bundles.
Original languageEnglish
Title of host publicationProcceedings of Twenty-Second International Conference on composite materials (ICCM22)
Number of pages6
Publication date2020
Publication statusPublished - 2020
Event22nd International Conference on Composite Materials 2019 (ICCM19): Advanced Composites: Research to Impact - Melbourne Convention and Exhibition Centre (MCEC), Melbourne, Australia
Duration: 11 Aug 201916 Aug 2019
Conference number: 22
http://iccm22.com/

Conference

Conference22nd International Conference on Composite Materials 2019 (ICCM19)
Number22
LocationMelbourne Convention and Exhibition Centre (MCEC)
CountryAustralia
CityMelbourne
Period11/08/201916/08/2019
Internet address

Keywords

  • Glass fiber composites
  • Fatigue
  • Tunnelling crack
  • X-ray tomography
  • Staining

Cite this

Bangaru, A. K., Sørensen, B. F., & Mikkelsen, L. P. (2020). Experimental Investigation of the Damage at the Tip of Tunnelling Crack in Glass Fibre Composites. In Procceedings of Twenty-Second International Conference on composite materials (ICCM22)