It is necessary to fabricate an aligned and discontinuous glass fiber-epoxy matrix composite having a longitudinal tensile strength of 1200 mpa (175,000 psi) using a 0.34 volume fraction of fibers. compute the required fiber fracture strength assuming that the average fiber diameter and length are 0.015 mm (5.9 × 10-4 in.) and 5.0 mm (0.20 respectively. the fiber-matrix bond strength is 80 mpa (11,600 psi), and the matrix stress at composite failure is 6.55 mpa (950 psi).

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.