6533b829fe1ef96bd1289a86
RESEARCH PRODUCT
Radiation curing of carbon fibre composites
Giuseppe SpadaroSabina AlessiMaria Antonietta SabatinoGiuseppe PitarresiG. PrzbytniakDavide TuminoClelia Dispenzasubject
RadiationMaterials scienceModulusThermal treatmentEpoxyFracture toughnessvisual_artvisual_art.visual_art_mediumSettore CHIM/07 - Fondamenti Chimici Delle TecnologieComposite materialGlass transitionThermal analysisBeam (structure)Curing (chemistry)Carbon fibre reinforced epoxy resin Radiation curingDynamic mechanical thermal analysisDelamination fracture toughnessdescription
Epoxy/carbon fibre reinforced composites were produced by means of e-beam irradiation through a pulsed 10 MeV electron beam accelerator. The matrix consisted of a difunctional epoxy monomer (DGEBA) and an initiator of cationic polymerisation, while the reinforcement was a unidirectional high modulus carbon fibre fabric. Dynamic mechanical thermal analysis was carried out in order to determine the cross-linking degree. The analysis pointed out a nonuniformity in the cross-linking degree of the e-beam cured panels, with the formation of clusters at low Tg (glass transition temperature) and clusters at high Tg. An out-of-mould post irradiation thermal treatment on e-beam cured samples provides a higher uniformity in the network although some slight degradation effects. Mode I delamination fracture toughness and Interlaminar Shear Strength (ISS) were also investigated by means of Double Cantilever Beam (DCB) and Short Beam Shear tests, respectively. Results from this mechanical characterisation allowed to correlate fracture toughness of the bulk matrix resin, cross-linking density and fibre/matrix interaction to the delamination fracture behaviour of the fibre reinforced material.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |