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

Composites Part C: Open Access

Gabriela Luiza Cota Coura¹  Fabrizio Scarpa¹  Lívia Ávila de Oliveira²  Vincent Placet²  Maikson Luiz PassaiaTonatto²  Túlio Hallak Panzera³ 

[1] Department of Natural Sciences - FQMat, Federal University of São João del Rei-UFSJ, Brazil;Centre for Innovation and Technology in Composite Materials – CITeC, Department of Mechanical Engineering - PPMEC, Federal University of São João del Rei-UFSJ, São João del Rei, Brazil;Group on Mechanics of Materials and Structures - GMEC, Federal University of Santa Maria – UFSM, Cachoeira do Sul, Brazil;

关键词: Sandwich panel;    Flax fibre;    Bamboo;    Thermosetting;    Flexural and shear properties;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown