Question

During laboratory testing of a 6-inch steel-alloy rod with a cross sectional area of 0.32in², a tensile load of 40,000 lbs is applied. If the cross sectional area decreases to 0.3188in² and lengthens to 6.021 inches, what is the Poisson’s Ratio?

Answer #1

Two steel rods each of cross sectional area 500mm2,
and an aluminium alloy rod, of cross sectional area 600
mm2 are cut to a length of 3m and attached to rigid end
plates to form a composite member.
If a tensile force of 100kN is applied to the member and at the
same tie the temperature of the system is lowered by 20℃, determine
the force developed in each of the rods and the extension of the
member.
What further...

A steel bar has cross-sectional area A=10-3
m2, Young modulus E= 2 x 1011 Pa and
Poisson’s ratio of 0.4. The steel bar has a rectangular cross
sectional area.
a.
If the bar is subject to
a compressive force of 105 N, find the corresponding
longitudinal and transverse
strains.
[3 marks]
b. Two strain
gauges, each with unstrained resistance of 120 Ω and a gauge factor
of 2.0 are bonded on to the top surface of the steel bar....

You have a nominal 3.5-inch diameter
tube steel pipe, 18 feet high that is embedded into a concrete
foundation. Neglecting the weight of the column, answer
the questions below:
What is the maximum vertical load this pipe can
support/critical load (lb)?
If a vertical load of 2,500 lbs and a horizontal force of 150
lbs are applied at the top of the column, what are the maximum
combined tensile and compressive stresses (psi) where the column
meets its foundation? Are they allowable?

A uniform rope of cross-sectional area 0.95 cm2
breaks when the tensile stress in it reaches 5.50 ? 106
N/m2.
(a)
What is the maximum load (in N) that can be lifted slowly at a
constant speed by the rope?
___________ N
(b)
What is the maximum load (in N) that can be lifted by the rope
with an acceleration of 5.00 m/s2?
___________ N

The small piston of a hydraulic lift (see figure below) has a
cross-sectional area of 2.70 cm2, and its large piston
has a cross-sectional area of 199 cm2. What downward
force of magnitude F1 must be applied to the
small piston for the lift to raise a load whose weight is
Fg = 14.0 kN?

A brass rod and a lead rod, each 0.250 mm long and each with
cross-sectional area 2.00×10−4m22.00×10−4m2, are joined end to end
to make a composite rod of overall length 0.500 mm. The free end of
the brass rod is maintained at a high temperature, and the free end
of the lead rod is maintained at a low temperature. The temperature
at the junction of the two rods is 185.0∘C∘C and the heat current
due to conduction through the composite...

What is PSF loading of the soil if, a 20-ton building transfers
its load equally though a 1000 SF foundation to the earth?
What is the expected force required to break a 6’ x 12” concrete
cylinder made from 3000 PSI concrete?
What is the stress in a no. 4 rod subjected to a force of 5000
lbs.?
how many times stronger is a no. 8 rod compared to a no. 4 rod
made of the same material (Compare cross...

A steel cable has a cross-sectional area 4.03 × 10-3 m2 and is
kept under a tension of 3.07 × 104 N. The density of steel is 7860
kg/m3. Note that this value is not the linear density of the cable.
At what speed does a transverse wave move along the cable?

A 100 ft steel tape of cross-sectional area 0.0025 in2, weight
2.0 lb, and standardized at 68°F is 99.983 feet between end marks
when supported throughout under a 10-lb pull.
a. What is the true horizontal length of a recorded distance AB
if AB was measured to be 140.23 ft? At the time of measurement, the
average temperature was 55°F, the tape was unsupported and there
was 17 lbs of tension on the tape. (Assume horizontal taping and
all full...

Please answer all four questions. Thank you!
1) A tensile load of 71,000 pounds is applied to a square steel
bar that is 0.75 inches in cross section dimension and has a gage
length of 6.5 inches. Under this load what is the longitudinal
elongation?
2) Write the 2 equations for steel corrosion as its iron changes
from that of fresh steel to fully corroded ferric oxide.
3) A square cross-section piece of metal is put under tensile
stress. The...

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