The use of single fibre pushout testing to explore interfacial mechanics in SiC monofilament-reinforced Ti—I. A photoelastic study of the test

Abstract

The frozen stress photoelastic technique has been used to investigate the elastic stress distribution during single fibre pushout testing. It is shown that the axial distributions of interfacial shear stress and axial stress in the fibre are broadly consistent with the Hseuh model, based on shear lag analysis. However, the experimental shear stress distribution is more uniform than that predicted, particularly for low aspect ratio fibres, so that interfacial shear debonding strength value obtained from debonding loads on the basis of the model may be overestimates. Estimates based on a uniform shear stress along the fibre length may be preferable, particularly for low aspect ratio fibres.