ASSIGNMENT NO.2
Assignment problem #1 (20 out of 100)
A bar
ABC
of length
L
consists of two parts of equal
lengths
but
different
diameters.
Segment
AB
has
diameter
d
1
=100mm and segment
BC
has diameter
d
2
=60mm. Both segments have length
L/
2=0.6m. A
longitudinal hole of diameter
d
is drilled through
segment
AB
for
onehalf
of
its
length
(distance
L/
4=0.3m). The bar is made of plastic having modulus
of elasticity
E
=4.0GPa. Compressive loads
P
=110kN
act at the ends of the bar.
If the shortening of the bar
is limited to 8mm, what is the maximum allowable
diameter
d
max
of the hole?
Solution
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View Full DocumentAssignment problem #2 (20 out of 100)
A uniform bar
AB
of weight
W
= 125N is supported
by two springs, as shown in the figure. The spring
on the left has stiffness
1
300
k
=
N/m and the
natural
length
L
1
=250mm.
The
corresponding
quantities for the spring on the right are
2
400
k
=
N/m and
L
2
=200mm. The distance between the
springs is
L
=350mm, and the spring on the right is
suspended from a support that is distance
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 Three '11
 BROWN
 Meter, segment AB, outer bars, roof load P1

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