Question

**( Calculate the modulus of elasticity of a fiber-reinforced polymer composite under isostrain condition if the composite consists of 35% fibers and 65% polymer by volume. Also, calculate the percentage of load carried by the fibers. The modulus of elasticity of the fibers and the polymer are 345 GPa and 3.5 GPa, respectively .**

Answer #1

Please round to the nearest one hundredth (i.e., 0.01).
Calculate the modulus of elasticity of a fiber-reinforced polymer
composite under isostrain condition if the composite consists of
55% fibers and 45% polymer by volume. The modulus of elasticity of
the fibers and the polymer are 50000000 psi and 600000 psi,
respectively. 1. Modulus of elasticity of the composite = Answer
psi 2. Determine the percentage of load carried by the fibers =
Answer %

for a continuous and aligned Kevlar-29 fiber-reinforced
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A fiber-reinforced composite material has moduli of elasticity
in the longitudinal and transverse directions of 6.9 GPa and 3.5
GPa, respectively. If fibers make up 25% of the composite volume
and 56% of them are oriented in the longitudinal direction, find
the moduli of elasticity of the fiber and matrix phases. Assume
that all fibers not oriented in the longitudinal direction are
oriented transversely.

For a continuous and oriented fiber-reinforced composite, the
moduli of elasticity in the longitudinal and transverse directions
are 19.7 and 3.66 GPa (2.8×106 and 5.3×105 psi), respectively. If
the volume fraction of fibers is 0.38, determine the moduli of
elasticity of fiber and matrix phases.

Two composite materials were suggested to be used for specific
application under isostrain condition. The first composite material
consists of 20% aramid fibers (modulus of elasticity:19×106 psi)
and 80% polycarbonate matrix (modulus of elasticity: 3.5×105 psi).
The second composite material consists of unidirectional
carbon-fiber reinforced –plastic. 20% fiber (modulus of elasticity:
55×106 psi) and 80% matrix (modulus of elasticity: 0.5×106
psi).
a) If the application requires modulus of elasticity to be not
less than 11×106 psi. Which composite material do...

A continuous and aligned carbon fiber-reinforced composite
consists of 60% by volume of high-strength carbon
fibers having a tensile strength of 3.9 GPa reinforced in a
polyester resin that, when hardened, displays a tensile
strength of 50 MPa. What is the tensile strength of this composite
in the longitudinal direction?

A short reinforced concrete column is subjected to a 700 kips
axial compressive load. The modulus of elasticity of plain concrete
and steel are 4,500,000 psi and 29,000,000, respectively, and the
cross-sectional area of steel is 3.0% of that of the reinforced
concrete. Considering the column as a structural member made of a
composite material and subjected to load parallel to the steel
bars. Calculate the modulus of elasticity of the reinforced
concrete, as well as how much load is...

3. Composites with fiber-reinforced structures with continuous
and aligned fiber properties are made of 45 vol% aramid fiber and
55 vol% polycarbonate matrix. The mechanical characteristics of the
two materials can be shown in the following table
Modulus of Elasticity [GPa (psi)]
Tensile Strength [MPa (psi)]
Aramid fiber
131 (19 × 106)
3600 (520000)
Polycarbonate
2.4 (3.5 × 105)
65 (9425)
When the aramid fiber breaks, the stress on the polycarbonate
matrix will be 35 MPa (5075 psi). Determine it...

(30 pts) A short reinforced concrete column is
subjected to a 1000 kN axial compressive load. The moduli of
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respectively, and the cross-sectional area of steel is 2% of that
of the reinforced concrete. Considering the column as a structural
member made of a composite material and subjected to load parallel
to the steel rebars, calculate the following:
a. the modulus of elasticity
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b....

A biomaterial composite is made of a polymer matrix with aligned
ceramic fibre reinforcement. The composite is deformed elastically
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modulus of the fibre, Ef, is 200 GPa and that of the matrix, Em, is
5 GPa. The volume fraction of the fibre is Vf = 20%. Calculate the
stress in the matrix.
a. 11 MPa
b. 100 MPa
c. 454...

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