A circular FRP composite rod with continuous and aligned fibers has a 75 mm diameter. The rod is simply supported with a span of 1.2 m and is subjected to three-point bending with a 1.2 kN center...

A circular FRP composite rod with continuous and aligned fibers has a

75 mm diameter. The rod is simply supported with a span of 1.2 m and is

subjected to three-point bending with a 1.2 kN center load.

a. If the maximum allowable center deflection cannot exceed 0.5 mm,

what is the minimum modulus of the composite in order to meet this

requirement?

b. If the FRP has a modulus as obtained in Part a and the moduli of the

matrix and the fibers are 3.5 GPa and 138 GPa, respectively, what is

minimum percent of fibers that meets this requirement?