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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 0.39 volume fraction of fibers. compute the required fiber fracture strength assuming that the average fiber diameter and length are 0.015 mm (5.9 ร 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).
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