Abstract
The aim of the present study is to investigate the effects of the temperature and fiber surface finishing on the interfacial fracture toughness of nylon-6/E-glass fibers composites. The fracture toughness evaluation is based on a new method, recently proposed by the authors, which yields the strain energy release rate associated with the fiber/matrix interfacial debonding, G arrest , as a combination of a finite element analysis and experimental measurements on embedded single fiber microcomposites. For the unsized E-glass fibers an interface toughness of 165 Jm −2 has been found, while for the polyamide and epoxy compatible sized E-glass fibers higher interfacial debonding energy values of about 340 Jm −2 have been measured. Both sized and unsized E-glass fiber microcomposites showed a strong decrease of the interfacial toughness as the temperature increased.
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