Analysis of the fragmentation test for carbon-fibre/epoxy model composites by means of Raman spectroscopy

摘要: Abstract The interfaces between high-modulus PAN-(T50) and mesophase pitch-based (P55) carbon fibres an epoxy matrix have been studied by using the conventional fragmentation test in conjunction with polarised-light optical microscopy. Raman spectroscopy has also used to follow stress transfer from for same geometries. level of fibre/matrix adhesion mechanisms which is transfered determined both birefringence patterns strain-induced band shifts fibres. values interfacial shear strength means analysis technique. It found that method gives a much more detailed picture specimens two methods give somewhat different strength. discussed respect fibre surface energy, chemistry morphology. was chemical functional groups appear no direct correlation Furthermore, it appears mechanical interlocking due roughness could contribute higher PAN-based fibre.