. Consider the fracture of a parallel fiber composite along the direction of the fibers. Assume Ef=420GPa, Em=100 GPa, smu=250MPa, Vf=0.4, r=6mm, t=20MPa, and gm=5 J/m2. a. Calculate sc in the above...

. Consider the fracture of a parallel fiber composite along the direction of the fibers. Assume Ef=420GPa, Em=100 GPa, smu=250MPa, Vf=0.4, r=6mm, t=20MPa, and gm=5 J/m2.

a. Calculate sc in the above composite considering only elastic load shifting.

b. Assume the fibers remain intact as the crack propagates. Calculate the strength according to the ACK theory.

c. Calculate the necessary strength of the fiber to avoid complete failure as the matrix crack extends across the specimen.

d. What is the crack-opening displacement (distance)?