Response of fibre composite laminates to acoustic emission line sources

摘要

This paper employs & multiple transform method to predict the surface response of a cross-ply fibre composite laminate to line sources associated with the formation of dislocations. Each layer of fibre composite material is modelled as atransversely isotropic continuum and the laminate is constructed of four plies with the fibre direction in the two inner plies being parallel to each other and at right angles to that in the outer plies. Line sources give rise to straight crested wavestravelling in the plane of the laminate at right angles to the direction of the line. Calculations are carried out for two different orientations of the line relative to the core fibre direction. Results are presented for crack opening and for sheardislocations lying in planes parallel to the plane of the laminate and located at the interfaces between each of the plies.