6533b85efe1ef96bd12bfd8d

RESEARCH PRODUCT

Effect of hydrothermal ageing on the thermal and delamination fracture behaviour of CFRP composites

Giuseppe PitarresiGiuseppe SpadaroSabina Alessi

subject

Materials scienceMechanical EngineeringPolymer–matrix composites (PMCs) Fracture toughness Environmental degradation Thermal analysisComposite numberDelaminationEpoxyDynamic mechanical analysisIndustrial and Manufacturing EngineeringHydrothermal circulationSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineFracture toughnessMechanics of MaterialsAgeingvisual_artCeramics and Compositesvisual_art.visual_art_mediumFracture (geology)Settore CHIM/07 - Fondamenti Chimici Delle TecnologieComposite material

description

Abstract This work investigates the hydrothermal ageing behaviour of a carbon fibre reinforced laminate and its epoxy matrix in bulk conditions. A model DGEBA epoxy is employed, and water uptake and dynamic mechanical thermal (DMTA) analyses have been performed on both the composites and bulk resin. Fracture toughness of the bulk resin has been measured, evidencing a substantially unmodified critical stress intensity factor KIC, although the evidence of plasticisation effects given by DMTA. Interlaminar Mode I fracture toughness of the composite showed a variable trend towards slight decreases or slight increases, according to the prevailing toughening or embrittling mechanisms activated by the aging conditions.

yearjournalcountryeditionlanguage
2014-12-01
http://hdl.handle.net/10447/95605