(a) Calculate and compare the specific longitudinal strengths of the glass-fiber, carbon-fiber, and aramid-fiber reinforced epoxy composites in Table 16.5 with the following alloys: tempered (315(C) 440A martensitic stainless steel, normalized 1020 plain-carbon steel, 2024-T3 aluminum alloy, cold-worked (HO2 temper) C36000 free-cutting brass, rolled AZ31B magnesium alloy, and annealed Ti-6Al-4V titanium alloy.

(b) Compare the specific moduli of the same three fiber-reinforced epoxy composites with the same metal alloys. Densities (i.e., specific gravities), tensile strengths, and moduli of elasticity for these metal alloys may be found in Tables B.1, B.4, and B.2, respectively, in AppendixB.

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Carbon (High Strength) 1.6 Glass Aramid (Kevlar 49) 1.4 Property Specific gravity Tensile modulus Longitudinal [GPa (10 psi)] Transverse [GPa (10 psi)] Tensile strength Longitudinal [MPa (ksi)] Transverse [MPa (ksi)] Ultimate tensile strain Longitudinal (E-glass) 2.1 45 (6.5) 12 (1.8) 145 (21) 10 (1.5) 76 (11) 5.5 (0.8) 1020 (150) 40 (5.8) 1240 (180) 41 (6) 1380 (200) 30 (4.3) 2.3 0.4 0.9 0.4 1.8 0.5 Transverse