It is desired to produce a continuous and oriented carbon fiber–reinforced epoxy having a modulus of elasticity of at least 83 GPa (12 × 106 psi) in the direction of fiber alignment. The maximum permissible specific gravity is 1.40. Given the following data, is such a composite possible? Why or why not? Assume that composite specific gravity may be determined using a relationship similar to Equation 15.10a.
| Specific Gravity | Modulus of Elasticity [GPa (psi)] |
Carbon fiber | 1.80 | 260 (37 × 106) |
Epoxy | 1.25 | 2.4 (3.5 × 105) |
(15.10a)
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