Q1 : A rod made of carbon reinforced epoxy has a diameter 2.5 cm, length 1.25 m, and mass 0.95 kg. The carbon fibers have a modulus of elasticity 340 GPa and a density 1.91 g/cm'. The epoxy matrix has modulus of elasticity 4 GPa and a density 1.16 g/cm'. Assume there are no voids in the rod. What is the volume fraction of (a) the carbon fibers and (b) the epoxy matrix in the rod? Also, what is the predicted value for the modulus of elasticity in the (c) longitudinal direction and (d) direction perpendicular to the carbon fibers?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q1 : A rod made of carbon reinforced epoxy has a diameter 2.5 cm,
length 1.25 m, and mass 0.95 kg. The carbon fibers have a modulus of
elasticity 340 GPa and a density 1.91 g/cm'. The epoxy matrix has
modulus of elasticity 4 GPa and a density 1.16 g/cm'. Assume there are
no voids in the rod. What is the volume fraction of (a) the carbon fibers
and (b) the epoxy matrix in the rod? Also, what is the predicted value for
the modulus of elasticity in the (c) longitudinal direction and (d) direction
perpendicular to the carbon fibers?
Transcribed Image Text:Q1 : A rod made of carbon reinforced epoxy has a diameter 2.5 cm, length 1.25 m, and mass 0.95 kg. The carbon fibers have a modulus of elasticity 340 GPa and a density 1.91 g/cm'. The epoxy matrix has modulus of elasticity 4 GPa and a density 1.16 g/cm'. Assume there are no voids in the rod. What is the volume fraction of (a) the carbon fibers and (b) the epoxy matrix in the rod? Also, what is the predicted value for the modulus of elasticity in the (c) longitudinal direction and (d) direction perpendicular to the carbon fibers?
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