Question

a solid circular steel rod has a length of 70 mm, diameter of 20 mm, and an eccentricity(offset) of 6 mm.Syiely =300Mpa. find the critical buckling load if its boundary condition are fixed-free(use theoretical value in table)

Answer #1

A solid steel shaft, 20 mm in diameter and 1 m long, is placed
concentrically inside a hollow
duralumin shaft with inside and outside diameters of 30 mm and
33 mm respectively and a
length of 500 mm. The ends of the hollow shaft are rigidly fixed
to the solid shaft. Determine
(a) the torsional stiffness of the composite shaft
(b) the maximum torque to which the composite shaft may be
subjected if the allowable
shear stresses for steel and...

A straight rod of solid polymer is of length 1 m and diameter 10
mm. The polymer is linearly viscoelastic with a tensile creep
compliance given by: D = 2- exp(-0.1t); Gpa^-1 Where t is in hours.
The rod is suspended vertically and a mass of 10 kg is hung from it
for 10 hours. Identify the time domain of this property test
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Due to the operational conditions and temperature gradient, a 70
mm diameter, 1.55 m long
steel rod within a machine assembly is subjected to a combination
of tensile loading of 150 N and
thermal loading which imposes a longitudinal force of 230 N. The
total loading results in an even
distribution of forces on the body of the rod causing it to change
its dimensions by increasing 0.5
mm in length at both ends and decreasing by 0.0125 mm at...

A cylindrical specimen of stainless steel having diameter of
12.8 mm and a guage length of 50.88 mm(2.000in.) is pulled in
tension. Use the load-elongation characterisitcs shown in the
following table. Plot the data as engineering stress vs.
engineering strain. Then compute the modulus of elasticity, yeild
strength at a strain offset of 0.002, determine the tensile
strength of this alloy, approximate ductility in percent elongation
and the modulus of resilience.
N
mm
0
50.8
12700
50.825
25400
50.851
38100...

Two circular rods, one steel and the other copper, are both
0.755 mm long and 1.50 cm in diameter. Each is subjected to a force
with magnitude 4250 N that compresses the rod. Use copper =
1.1*1011 and steel = 2.0 *
1011.
What is the difference in the length of the two rods when
compressed?
Express your answer in meters to two significant figures.
Answer is NOT 6.05 x 10-5

An aluminum wire with a diameter of 0.105 mm has a uniform
electric field of 0.265 V/m imposed along its entire length. The
temperature of the wire is 45.0° C. Assume one free electron per
atom.
(a) Use the information in this Table of Resistivities and
Temperature Coefficients to determine the resistivity of aluminum
at this temperature.
ρ = ..... Ω·m
(b) What is the current density in the wire?
J =....... MA / m2
(c) What is the total...

An aluminum wire with a diameter of 0.095 mm has a uniform
electric field of 0.225 V/m imposed along its entire length. The
temperature of the wire is 45.0° C. Assume one free electron per
atom.
(a) Use the information in this Table of Resistivities and
Temperature Coefficients to determine the resistivity of aluminum
at this temperature.
ρ = Ω·m
(b) What is the current density in the wire?
J = MA / m2
(c) What is the total current in the...

1. An aircraft weights 120,000 lbs., it has 35,000 lbs. of fuel
added. What will be its takeoff weight? If there is 350 lbs. of
excess weight what will be its new weight?
Hint 1 kg = 2.21 lbs. Gravity = 9.81 N/m
(up to 5 points)
2. Why is the fracture value less than the UTS value shown on a
stress-strain graph?
(up to 5 points)
3. Use the table below that gives the yield point for three
materials....

Total utility can be objectively measured in numbers that
indicate usefulness or benefit to the consumer.
____ 2. Consumers should purchase quantities of a good to the
point where MU > P.
____ 3. Voluntary exchange requires that there must be mutual
gain.
____ 4. Points along a budget line represent the maximum
combinations of two commodities that a consumer can afford.
____ 5. The budget line represents a consumer's preferences
for a commodity.
____ 6. A change in consumer...

MK Restaurant: Branding of Thai-Style Hotpot
The restaurant industry is one of the most competitive in
Thailand. With a large number of players ranging from restaurants
in five-star hotels, global fast-food chains to small stalls along
the streets and everything in between, the Thais are spoiled for
choice. In addition, as the world becomes globalized, consumers are
familiar with international dishes and would not hesitate to try
new offerings from the other side of the globe. As a...

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