Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Textbook Question
Chapter 12.15, Problem 46AAP
If the tensile strength of the Kevlar 49 fibers is 0.550 × 106 psi and that of the epoxy resin is 11.0 × 103 psi, calculate the strength of the composite material of Problem 12.45. What fraction of the load is carried by the Kevlar 49 fibers?
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Calculate the density of a composite made with 35% Kevlar-49 fibers in an epoxy resin (ρ = 1.1 kg/m3, E = 2.5 GPa). For Kevlar-49, Ef = 131 GPa; density = 1440 kg/m3
A composite with a minimum elastic modulus of 50 GPa is to be
created by mixing uniaxial epoxy with metal fibre. Calculate the
minimum Elastic modulus of the metal fibre given the following
data for the epoxy matrix:
Elastic modulus of the epoxy matrix is 5 GPa
• Volume fraction of the epoxy matrix is 0.6
A-
в I
U S x2
x
Calculate the modulus of rigidity (shear
modulus) of an epoxy resin if the modulus of
elasticity (Young's modulus) E = 3.5 GPa and
the Poisson's ratio = 0.35.
Select one:
a. G = 2.6 GPa
b. G = 10 GPa
c. G = 3.15 GPa
d. G= 0.1 GPa
e. G = 1.3 GPa
Chapter 12 Solutions
Foundations of Materials Science and Engineering
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