Inherent brittleness of epoxy in composite laminates restricted their application in many industries. Therefore, researchers are trying to decrease this shortage by interleaving electrospun nanofibers for toughening the matrix. In this research the influence of composite nanofibers on mode I fracture toughness of composite laminate is considered. For this aim, Polycaprolactone (PCL) and Nylon 6,6 nanofibers and their composition were interleaved in the mid-plane of unidirectional carbon/epoxy laminates. The results showed that PCL nanofibers did not have a positive effect on mode I energy release rate (GI) and Nylon 6,6 could increase it significantly, while the effect composite nanofibers is more than both of these nanofibers. For understanding more details and the role of nanofibers during the test, the crack path was investigated by optical microscope.
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Bovicelli et al. (2014) studied this question.
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