The role of interface and fibre anisotropy in controlling the performance of polyethylene-fibre-reinforced composites

The objective of the present study is to investigate the role of this highly anisotropic character of high-performance polyethylene fibres on the off-axis performance of their composites

T. Peijs

2003

Scholarcy highlights

  • Since it is generally recognized that the level of fibre/matrix adhesion is the key factor for an optimum translation of fibre properties to composite performance, many attempts have been made to improve the structural applicability of composites based on high-performance polyethylene fibres by improving the bond strength between this fibre and polymer matrices
  • In this study it was attempted to obtain more insight into the role of adhesion and the highly anisotropic character of HP-PE fibres on the strength of composite laminates based on HP-PE fibres
  • It was concluded that properties such as transversc, shear from debonding to fibre fibrillation and fibre splitting, suggesting fibre dominated properties rather than the interfacial dominated properties in the case of composites based on plasma-treated HP-PE fibres
  • More quantitative information on the role of fibre anisotropy was obtained from off-axis tensile testing of ultradrawn ultrahigh molecular weight polyethylene tapes, which was used as an alternative to off-axis fibre testing
  • The effect of plasma treatments on the reduction in tensile strength was generally fairly small. 15'17"23"24Besides corona and plasma treatments, chemical etching has been used.24'25 Recently, Mercx et al 26-2~ showed that regardless of the type of treatment, being either chemical etching, corona or plasma, the introduction
  • These tests showed that the off-axis properties of HP-PE/epoxy composites with a good fibre/matrix bond strength are similar to the off-axis strength of ultradrawn UHMW-PE
  • In compression the strength of high-performance polyethylene composites is dominated by the low compressive yield stress of the fibre rather than by the interface

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