Manufacturing and Shear Response Characterization of Carbon Nanofiber Modified CFRP Using the Out-of-Autoclave-Vacuum-Bag-Only Cure Process

Table 2

The materials properties [16–18] used in the micromechanics model.

Symbol	Definition	Value
𝐸resin	Epoxy resin modulus	3.854 GPa
𝐸CNF	CNF modulus	600 GPa
𝑆resin	Epoxy resin tensile strength	0.141 GPa
𝑆CNF	CNF tensile strength	7.0 GPa
𝜆resin	Poison’s ratio of epoxy resin	0.265
𝜆CNF	Poison’s ratio CNF (assumed to be the same as a typical carbon fiber)	0.2
𝑣CNF	CNF volume fraction	0.069
𝑣𝑚	Matrix volume fraction	1−𝑣CNF
𝜌CNF	CNF density	1.8 g/cm^3
𝜌resin	Epoxy resin density	1.2 g/cm^3
𝑙CNF	Length of CNF	100 𝜇m
𝑑CNF	Diameter of CNF	0.2 𝜇m