Influence of mode ratio and hygrothermal condition on the delamination toughness of a thermoplastic particulate interlayered carbon/epoxy composite

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.…”

“…Davidson et al [38] performed tests on both dry and moisture-saturated, carbon/epoxy, prepreg laminates with a thermoplastic particulate toughened interlayer at different temperatures. This study compared the properties of dry and wet toughened laminates; there was no comparison between toughened and baseline laminates.…”

“…T g ) and water absorption behaviour -have not been investigated in depth. Also, due to the use of composite materials in a variety of applications, the properties of toughened laminates should be characterised over a wide range of environmental conditions [38]. The thermoplastic material that will be used in the non-woven interlaminar veils for this research is PA, which readily absorbs moisture.…”

Influence of temperature on the delamination process under mode I fracture and dynamic loading of two carbon–epoxy composites

“…The authors analyzed the elastic properties of the material at different temperatures in order to evaluate the stress intensity factor. Other authors [15][16][17][18][19][20] have analyzed the effect of temperature on composites under static and fatigue loading for different modes of fracture with thermal and moisture effects.…”