Composite Materials Research Progress

156
Stress (MPa)
120
80
40
0
Yuanxin Zhou, Hassan Mahfuz, Vijaya Rangari et al.
Neat Epoxy
+1.% SiC Nano Particle Filled Epoxy
0.00 0.02 0.04 0.06
Strain (mm/mm)
Figure 23. Stress-strain curves of the epoxy.
Figure 23 shows the stress-strain curves of epoxy and nanophased epoxy. It can be
observed that both the modulus and strength have been improved by filling nano particle into
matrix system. All parameters of fiber and matrix were listed in Table 6.
Table 6. Parameters of T700 fiber and matrix
Material T700 carbon fiber Neat epoxy Nano-phased epoxy
E (GPa) 210 2.45 3.32
G (GPa) 87.5 1.02 1.38
D ( μ m ) 5 -------- --------
Vf (or Vm) 49% 51% 51%
β 9.03 -------- -------σ
0 ( GPa)
2.70 -------- -------σ
b (MPa)
-------- 89 110
τ ( ) -------- 45 55
max GPa