Interfacial friction analysis for fibre-reinforced composites during fibre push-down (indentation)
Journal
Journal of Materials Science
Journal Volume
25
Pages
818-828
Date Issued
1990
Author(s)
Abstract
Effects of Coulomb friction and radial clamping stress on the mechanical properties at the fibre/matrix interface are considered for fibre-reinforced composites when an axial compressive stress (or indentation) is used to push on the free-surface end of the embedded fibre. The interfacial frictional shear stress, elastic stress transfer, length of the sliding zone, and fibre and matrix displacements along the fibre length are analysed analytically. Results are calculated for SiC fibre reinforced Al2O3 composites. The results show that the interfacial shear stress is not constant but decreases along the fibre length with increasing distance from the surface. The interfacial shear stress increases as the coefficient of friction, radial clamping stress, or Poisson's ratio of the fibre increases, which in turn results in an increase in the elastic stress transfer from the fibre to the matrix and a decrease in both the length of the sliding zone and the fibre displacement in the loading direction. However, when Poisson's ratio of the matrix increases, the stress transfer from the fibre to the matrix decreases.
SDGs
Type
journal article