A novel sandwich panel made of prepreg flax skins and bamboo core

Lívia Ávila de Oliveira, Gabriela Luiza Cota Coura, Maikson Luiz PassaiaTonatto, Túlio Hallak Panzera, Vincent Placet, Fabrizio Scarpa

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This work describes the bending and shear mechanical properties of a novel concept of sustainable sandwich panel made from unidirectional prepreg flaxtape skins and bamboo rings as a circular core material. A Design of Experiment (DoE) is used to determine the influence of the bamboo diameter and the type of adhesive bonding between core and skins on the equivalent density, flexural and shear properties of these panels. Numerical analysis are also performed using cohesive surface contacts between skins and bamboo rings to investigate the structural behaviour and failure mechanisms of the sandwich panels. The equivalent density is affected by both factors, with an overall decrease when larger bamboo rings and lower density adhesive are used. Although sandwich panels with the larger bamboo rings as core show superior flexural properties and skin stress, smaller bamboo rings cores shows an increase in the core transverse shear modulus. The physical and mechanical characteristics of the adhesives directly affect the failure mode and the overall structural integrity of the panels.
Original languageEnglish
Article number100048
Number of pages11
JournalComposites Part C: Open Access
Early online date2 Oct 2020
Publication statusPublished - 1 Nov 2020


  • sandwich panel
  • flax fibre
  • bamboo
  • thermosetting
  • flexural and shear properties


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