Failure maps of biocomposites mechanical joints reinforced with natural fibres Articles uri icon

publication date

  • July 2021

start page

  • 1

end page

  • 8

volume

  • 5

International Standard Serial Number (ISSN)

  • 2666-6820

abstract

  • Failure maps of mechanical joints have been developed for traditional composites as CFRPs and GFRPs to predict failure modes as a function of joint geometry. Nevertheless, the results of these failure maps cannot be applied to biocomposites reinforced with natural fibres. This paper presents a novel study of the failure modes of biodegradable composite mechanical joints. The influence of joint geometrical parameters, as sample width and the distance of the hole to the free edge, on peak loads and failure modes is analysed for different natural fibres reinforcements. Biodegradable composites were manufactured with PLA matrix reinforced with flax, jute and cotton fibres. A failure map for each material is obtained identifying the regions of typical failure modes of mechanically fastened joints. The comparison of different natural fibres indicates that the fibre strength has a clear influence on the prevention of shear out failure mode but the influence on the net-tension failure is not so clear.

keywords

  • biocomposites; experimental testing; mechanical joints; natural fibres