Problem

It is desired to produce a continuous and oriented carbon fiber–reinforced epoxy having a...

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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