Question
In: Mechanical Engineering
A composite of Al2O3 particles in an epoxy matrix contains 10 wt.% Al2O3. What are the...
A composite of Al2O3 particles in an epoxy matrix contains 10 wt.% Al2O3. What are the upper and lower bounds on the elastic modulus of the composite? Data: ρAl2O3 = 3.95 g/cm3 , EAl2O3 = 300 GPa, ρepoxy = 2.0 g/cm3 , and Eepoxy = 500 MPa.
Solutions
samet mamat answered 2 years agoRelated Solutions
Compute the longitudinal tensile strength of an aligned glass fiber-epoxy matrix composite in which the average...
Compute the longitudinal tensile strength of an aligned glass
fiber-epoxy matrix composite in which the average fiber diameter
and length are 0.0155 mm (0.60 × 10-4 in.) and 1.07 mm (0.042 in.),
respectively, and the volume fraction of fibers is 0.38. Assume
that (1) the fiber-matrix bond strength is 100 MPa (14,500 psi),
(2) the fracture strength of the fibers is 3500 MPa (5 × 105 psi),
and (3) the matrix stress at composite failure is 5.5 MPa (800
psi).
What is composite? Explain comparison between metal matrix and ceramic matrix composit
What is composite? Explain comparison between metal matrix and
ceramic matrix composit
1a. Spheroidite steel is a good example of Metal Matrix Composite material. What are the matrix...
1a. Spheroidite steel is a good example of Metal Matrix
Composite material. What are the matrix material and the dispersed
phase acting as a reinforcing agent?
1b. Name one material that is commonly used as the fibers in
fiber reinforced composites.
2a. In metals increasing “imperfections” e.g. grain boundaries,
dislocations, vacancies in the material will increase or decrease
the resistivity of that material? Briefly explain why.
2b. Does the resistivity of a copper increase or decrease when
it is heated...
1a. Spheroidite steel is a good example of Metal Matrix Composite material. What are the matrix...
1a. Spheroidite steel is a good example of Metal Matrix
Composite material. What are the matrix material and the dispersed
phase acting as a reinforcing agent?
1b. Name one material that is commonly used as the fibers in
fiber reinforced composites.
2a. In metals increasing “imperfections” e.g. grain boundaries,
dislocations, vacancies in the material will increase or decrease
the resistivity of that material? Briefly explain why.
2b. Does the resistivity of a copper increase or decrease when
it is heated...
74) Epoxy is a(n) ? a) elastomer b) thermoset c) thermoplastic d) composite . 75) In...
74) Epoxy is a(n) ?
a) elastomer
b) thermoset
c) thermoplastic
d) composite
.
75) In tempering of steel, temperature treatments around
400 °C are used to?
a) reduce brittleness and increase ductility (toughen) by
transforming martensite morphology
b) increase strength and hardness by locking in martensite
structure
c) increase strength and hardness by causing lower density glass
layer to form on surface
d) reduce brittleness and increase ductility (toughen) by
causing martensite morphology to form
.
76) Surface carburizing...
A gas contains 55.0 wt% methane, 5.00 wt% ethane, 35.0 wt% ethylene, and the balance water....
A gas contains 55.0 wt% methane, 5.00 wt% ethane, 35.0 wt%
ethylene, and the balance water. If 100.0 kg/h of this fuel is to
be burned with 30.0% excess air, what is the required air feed
rate? in kmol/h What is the required feed rate if the combustion is
only 75.0% complete? in kmol/h
Plot longitudinal tensile strength of an E-glass/epoxy unidirectionally reinforced composite as a function of volume fraction...
Plot longitudinal tensile strength of an E-glass/epoxy
unidirectionally reinforced composite as a function of volume
fraction of fiber and assuming tensile strength follows a volume
rule of additivity.
E-glass: modulus = 72.4 GPa, tensile break strength = 2.4 GPa,
break strain = 2.6%
epoxy: modulus = 3.5 GPa, tensile break strength = 45 MPa, break
strain = 1.28%
A liquid mixture contains 60 wt% ethanol, 5 wt% of a dissolved solute, and the balance...
A liquid mixture contains 60 wt% ethanol, 5 wt% of a dissolved
solute, and the balance water. A stream of this mixture is fed to a
distillation column operating at steady state. The streams emerging
from the column have equal mass flow rates. The top stream contains
90 wt% ethanol with no solute.
Solve for all the mass fractions of the bottom stream and solve
for the 3 mass flow rates
A liquid mixture contains 60.0 wt% ethanol (E), 5.0 wt% of a dissolved solute (S), and...
A liquid mixture contains 60.0 wt% ethanol (E), 5.0 wt% of a
dissolved solute (S), and the
balance water (W). A stream of this mixture is fed to a continuous
distillation column
operating at steady-state. Product streams emerge at the top and
bottom of the column.
The column design calls for the product streams to have equal mass
flow rates and for the
top stream to contain 90.0 wt% ethanol and no S. (Hint: In order to
solve this problem,...
What is the primary method of deposition for large, high-mass particles? Particles of 10 microns or...
What is the primary method of deposition for large, high-mass
particles?
Particles of 10 microns or larger tend to deposit in what part
of the respiratory tract? What about particles between 5 and 10
microns?
What other substances are found in MDIs that may produce
clinical problems?
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