For some glass fiber-epoxy matrix combination, the critical fiber length-fiber diameter ratio is 50. Using the data in Table 16.4, determine the fiber-matrix bond strength.

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Specific Strength (GPa) Tensile Modulus Specific Modulus Streng th [GPa (10 psi)] of Elasticity IGP (10" psi)) Specific Gravity Material (GPa) Whiskers Graphite 2.2 20 9.1 700 318 (3) 5-7 (100) 350-380 1.56-2.2 Silicon nitride 3.2 109-118 (0.75-1.0) 10-20 (1-3) (50-55) 700-1500 175-375 Aluminum oxide 2.5-5.0 4.0 (100-220) Silicon carbide 3.2 20 6.25 480 150 (3) (70) Fibers 1.38 3.95 Aluminum oxide 0.35 379 96 (0.2) 3.6-4.1 (55) 131 Aramid (Kevlar 49rm) 2.5-2.85 1.44 91 (0.525-0.600) 1.5-4.8 (19) 228-724 (32-100) 72.5 Carbon 106-407 1.78-2.15 0.70-2.70 (0.22-0.70) 3.45 E-glass 2.58 1.34 28.1 (10.5) 400 (0.5) 3.6 (0.52) 3.9 (0.57) 2.6 (0.38) 2.57 1.40 Boron 156 (60) 3.0 1.30 133 Silicon carbide (60) UHMWPE (Spectra 900TM) 0.97 2.68 121 (17) Metallic Wires High-strength steel 7.9 2.39 0.30 210 26.6 (0.35) 2.2 (30) 324 Molybdenum 10.2 0.22 31.8 (0.32) 2.89 (47) 407 Tungsten 19.3 0.15 21.1 (0.42) (59)