A unidirectional pultruded carbon fiber sheet with a width of 76
mm and a thickness of 1.27 mm was used. After testing a total of 16 straight strips ~coupons! with a length of 400 mm and a width
of 25 mm, an average tensile strength of 2,137 MPa, a tensile
modulus of elasticity of 144.0 GPa, and a Poisson’s ratio of 0.34
were obtained. A typical stress-strain plot for CFRP coupons
tested in uniaxial tension is shown in Fig. 1~a!.