Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 14, Problem 6ETSQ
To determine
The composite material that could be recycled by melting the shredded composite and form recycled pellets with uniform properties.
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A fiberglass composite consists of epoxy matrix reinforced with randomly oriented and uniformly distributed E-glass fibers. The moduli of elasticity of the glass fibers and the epoxy are 10 * 106 psi and 1 * 106 psi, respectively.Calculate the modulus of elasticity of the fiberglass if the volume percentage of fibers is (a) 30%, (b) 50%, and (c) 70%. Plot a graph showing the relationship between the modulus of elasticity of the fiberglass and the percent of fibers. Comment on the effect of the percent of glass fibers on the modulus of elasticity of fiberglass.
Which one of the following
reinforcing geometries offers the
greatest potential for improving
strength and stiffness in the
resulting composite material?
a) flakes.
Ob) particles.
O c) discontinuous fibers.
O d) continuous fibers
A composite sample of carbon reinforced epoxy has dimensions of in 20 in x 20 in x 0.135 in and mass of 3 lb. The carbon fibres have a modulus of elasticity of 80(106) lb/in2 and a density of 0.15 lb/in3. The epoxy matrix has modulus of elasticity of 0.90(106) lb/in2 and a density of 0.05 lb/in3.
Assume there are no voids in the sample, calculate the volume fraction of:
(i) The carbon fibres
(ii) The epoxy matrix in the sample.
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Materials Science And Engineering Properties
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