A continuous and aligned fiber-reinforced composite has a cross-sectional area of 500 mm2 and is subjected to a longitudinal load of 50,000 N. The composite is 25 vol % fiber 75 vol% polycarbonate matrix. Assume isostrain exists in longitudinal direction. Boron fiber modulus of elasticity is 380 GPa; Polycarbonate modulus of elasticity is 2.4 GPa;
1. Calculate the fiber–matrix load ratio.
2. Compute the actual loads carried by both fiber and matrix phases.
3. Calculate the magnitude of the stress on each of the fiber and matrix phases.
4. What strain is experienced by the composite?