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

The influence of hydrothermal conditioning on the Mode-I, thermal and flexural properties of Carbon/Benzoxazine composites with a thermoplastic toughening interlayer

“…The wet baseline samples experienced an increase in G IC due to hot/wet soaking that is consistent with previously published results [38,45,46]. Slight increases in G ICinit for both BZ9120 and BZ9130 wet baseline samples are due to an increase in matrix ductility, which increases the size of the process zone at the crack tip due to plastic deformation.…”

“…However, G IC has been reported to improve under hot/wet conditions [38,45,46]. This is brought about by a reduction in interfacial bonding strength between the fibre and matrix and an increase in ductility of the matrix hence allowing fibre/matrix debonding failure to occur earlier.…”

Effect of hygrothermal aging on the mechanical properties and ductile fracture of polyamide 6: Experimental and numerical approaches

“…It is demonstrated that moisture gained by hygrothermal aging impoverishes the fracture toughness of Nylon 12 [2]. However, from the literature review, many others researchers found that the increased polymer chain mobility which usually interpreted as a plasticization effect, and as such, it should produce an increase of fracture toughness [8].…”

Interlaminar adhesion assessment of carbon-epoxy laminates under salt water ageing using peel tests

“…In these cases, the prevailing fracture mechanism is fibre/matrix interface failure. According to the literature, 16,20 this is the governing damage mechanism in polymer composites exposed to environmental ageing. Figure 6 shows the fracture surfaces obtained from the rigid adherend in high magnification (Â1000, LEI, 5.0 kV).…”

“…Quasi-static fracture test results showed that exposure to moisture has a bigger effect on mode II than mode I toughness. 19 Fernandes et al 20 verified that the influence of humidity increases the brittleness of carbon-epoxy bonded joints. Alessi et al 21 showed that mode I delamination behaviour arises from the concurrent activation of both toughening and embrittling mechanisms.…”