Experimental and numerical analysis of peel failure between alumina ceramics and glass fibre-reinforced composites

Tom Thorvaldsen, Bernt B. Johnsen, Tyler P. Jones, Dennis B. Rahbek, Luiz F. Kawashita

Research output: Contribution to conferenceConference Paper

1 Citation (Scopus)

Abstract

In this work, experimental techniques, analytical calculations and finite element modelling (FEM) have been employed to investigate the failure between an alumina ceramic and a glass fibre-reinforced polyester composite under quasi-static loading in peel. Peel strength was determined experimentally employing the fixed arm peel test. In this test, the flexible glass fibre/polyester peel arm was peeled off the rigid ceramic substrate at a peel angle of 45 degrees. Different surface treatments of the alumina resulted in different levels of adhesion between the ceramic and the composite, and several cases have been included in the analysis of the fracture energy. At low levels of adhesion, the analytical models gave a good estimate of the fracture energy. However, at higher levels of adhesion the composite material showed clear signs of in-plane compressive and tensile damage due to the severity of the bending deformation, and the analytical solutions were no longer valid. FEM analyses were performed in MSC.Marc/Mentat, where built-in tools for cohesive zone modelling (CZM) were used to model the fracture of the composite-ceramic interface. The constitutive model of the cohesive elements was expressed as a bilinear function of the traction versus the effective opening displacement. The glass fibre-reinforced polyester composite was modelled employing composite elements, whereas the alumina ceramic was modelled using 3D brick elements. The FEM analyses were found to give a very good estimate of the fracture energy by reproducing accurately the dissipative nature of the composite material for the peel test.

Original languageEnglish
Publication statusPublished - 1 Jan 2015
Event20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark
Duration: 19 Jul 201524 Jul 2015

Conference

Conference20th International Conference on Composite Materials, ICCM 2015
CountryDenmark
CityCopenhagen
Period19/07/1524/07/15

Keywords

  • Ceramics
  • Cohesive zone modelling
  • Composites
  • Fracture energy
  • Peel testing

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    Thorvaldsen, T., Johnsen, B. B., Jones, T. P., Rahbek, D. B., & Kawashita, L. F. (2015). Experimental and numerical analysis of peel failure between alumina ceramics and glass fibre-reinforced composites. Paper presented at 20th International Conference on Composite Materials, ICCM 2015, Copenhagen, Denmark.