Two cables, each having a length i. of approximately 40 m, support a loaded -container of weight W (see figure). The cables, which have an effective cross-sectional area A = 48.0 mm 2 and effective modulus of elasticity E = 160 GPa. are identical except that one cable is longer than the other when they are hanging separately and unloaded. The difference in lengths is d = 100 mm. The cables are made of steel having an elastoplastic stress-strain diagram with a r = 500 MPa. Assume that the weight ft' is initially zero and is slowly increased by the addition of material to the container. (a) Determine the weight W y that lirsl produces yielding of the shorter cable. Also, determine the corresponding elongation 5 of the shorter cable. (b) Determine the weight W p that produces yielding of both cables. Also, determine the elongation S p of the shorter cable when the weight W just reaches the value W p . (c) Construct a load-displacement diagram showing the weight W as ordinate and the elongation & of the shorter cable as abscissa. Hint: The load displacement diagram is not a single straight line in the region 0 ^ W ^ W Y ,
Two cables, each having a length i. of approximately 40 m, support a loaded -container of weight W (see figure). The cables, which have an effective cross-sectional area A = 48.0 mm 2 and effective modulus of elasticity E = 160 GPa. are identical except that one cable is longer than the other when they are hanging separately and unloaded. The difference in lengths is d = 100 mm. The cables are made of steel having an elastoplastic stress-strain diagram with a r = 500 MPa. Assume that the weight ft' is initially zero and is slowly increased by the addition of material to the container. (a) Determine the weight W y that lirsl produces yielding of the shorter cable. Also, determine the corresponding elongation 5 of the shorter cable. (b) Determine the weight W p that produces yielding of both cables. Also, determine the elongation S p of the shorter cable when the weight W just reaches the value W p . (c) Construct a load-displacement diagram showing the weight W as ordinate and the elongation & of the shorter cable as abscissa. Hint: The load displacement diagram is not a single straight line in the region 0 ^ W ^ W Y ,
Two cables, each having a length i. of approximately 40 m, support a loaded -container of weight W (see figure). The cables, which have an effective cross-sectional area A = 48.0 mm2 and effective modulus of elasticity E = 160 GPa. are identical except that one cable is longer than the other when they are hanging separately and unloaded. The difference in lengths is d = 100 mm. The cables are made of steel having an elastoplastic stress-strain diagram with a r= 500 MPa. Assume that the weight ft' is initially zero and is slowly increased by the addition of material to the container.
(a) Determine the weight Wythat lirsl produces yielding of the shorter cable. Also, determine the corresponding elongation 5 of the shorter cable.
(b) Determine the weight Wpthat produces yielding of both cables. Also, determine the elongation Spof the shorter cable when the weight W just reaches the value Wp.
(c) Construct a load-displacement diagram showing the weight W as ordinate and the elongation & of the shorter cable as abscissa. Hint: The load displacement diagram is not a single straight line in the region 0 ^ W ^ WY,
Body (A) as shown in Figure below has weight equal to(175 N) and the
homogenous bar (E ) has weight equal (50 N) .Draw a free body diagram of each
two bodies
B
A
D
3
E
F
40
Cable
2.
SITUATION 2
A riveted bracket show in the figure is subjected to load P acting at an angle of 0 from the vertical. There are 8-
20mm diameter rivets, four on each column flange and two plates one on each column flange. P=35KN, 0 = 60°,
a=300mm, b=450mm, e=250mm
a. Determine the maximum moment experienced by the bolted connection
b. Determine the force due to direct load carried by the most critical rivet
c. Determine the force due to the induced moment carried by the most critical rivet
d. Determine the maximum resultant load carried by the most critical rivet
P
ba
- two plates
(One on each
column flange)
8 rivets
|(4 on each column
lange)
The structure of a bridge in Figure 1.1 consist of 11 members. The structure is supported
using pin at 4 and rocker at E with load Pi= 20 kN and P: = 10KN at G and F
Q1
respectively.
(a)
Determine the support reactions at A and E.
(b)
If the force in any member should not exceed 15 kN in Tension and 20 kN in
compression, determine which truss member/s would fail (if any). Justify your
answer using appropriate analysis method.
В
C
D
2 m
G
F
A
E
+ 1.5 m 1.5 m →l< 1.5 m < 1.5 m
P2
Figure 1.1 Truss structure of a bridge
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