Condition #1: A structural support for a machine is subjected to a static compression load of 20 kN. The support is manufactured from a circular rod made from SAE 1040 Hot Rolled steel. Specify suitable diameter for the cross section of the rod based on the basic size. Steel data are available in Table A-10 from the textbook.
Condition #1: A structural support for a machine is subjected to a static compression load of 20 kN. The support is manufactured from a circular rod made from SAE 1040 Hot Rolled steel. Specify suitable diameter for the cross section of the rod based on the basic size. Steel data are available in Table A-10 from the textbook.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
![Condition #1:E
A structural support for a machine is subjected to a static compression load of 20 kN. The support is
manufactured from a circular rod made from SAE 1040 Hot Rolled steel. Specify suitable diameter for
the cross section of the rod based on the basic size. Steel data are available in Table A-10 from the
textbook.
Condition #2:
The same structural support of the basic size determined in Condition 1 is subjected to a tensile load of
15 kN that is repeated several thousand times over the life of the machine. This load is not an addition to
the 20 kN. Specify a suitable steel that is suitable to this application based on the basic size determined in
Condition #1. Loading of Condition #1 does not apply here.
Condition #3:
The same structural support from Condition 2 is heated from room temperature of 25°C. The support is
placed inside a frame on both ends. There is a total clearance of 0.2 mm between the support and its
frame. Initial length of the rod is 200 mm. Specify the maximum temperature that the support can be
heated to without exerting any stress to the frame.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3e74b820-ac9b-4678-828a-bb567e122e7d%2F5d2deb39-7a85-4587-b935-47c08c14b425%2Fhgcxbh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Condition #1:E
A structural support for a machine is subjected to a static compression load of 20 kN. The support is
manufactured from a circular rod made from SAE 1040 Hot Rolled steel. Specify suitable diameter for
the cross section of the rod based on the basic size. Steel data are available in Table A-10 from the
textbook.
Condition #2:
The same structural support of the basic size determined in Condition 1 is subjected to a tensile load of
15 kN that is repeated several thousand times over the life of the machine. This load is not an addition to
the 20 kN. Specify a suitable steel that is suitable to this application based on the basic size determined in
Condition #1. Loading of Condition #1 does not apply here.
Condition #3:
The same structural support from Condition 2 is heated from room temperature of 25°C. The support is
placed inside a frame on both ends. There is a total clearance of 0.2 mm between the support and its
frame. Initial length of the rod is 200 mm. Specify the maximum temperature that the support can be
heated to without exerting any stress to the frame.
![A-10 Typical properties of carbon and alloy steels
Ultimate strength, s
Yield strength.s
Percent
elongation
Material SAE no.
Condition
ksi.
MPa
MPa
1020
1020
Annealed
Hot rolled
Cold drawn
57
65
75
393
448
96
331
43
36
48
1020
64
441
20
1040
1040
1040
1040
1040
1040
1040
Annealed
Hot rolled
Cold drawn
WOT 700
WOT 900
WOT LI00
WQT 1300
75
90
97
127
118
107
517
621
669
876
814
738
600
352
414
565
641
621
552
434
51
60
82
30
25
16
91
90
80
1080
1080
1080
1080
1080
Annealed
OQT 700
OQT 900
OQT 100
ÖOT 1300
189
179
145
117
614
1303
1234
1000
807
54
141
129
103
70
372
972
889
710
483
1141
Annealed
Cold drawn
OQT 700
600
352
655
186
889
26
1141
12,
193
146
116
772
1331
1007
800
95
172
129
97
14
1141
1141
OQT L100
OQT 1300
1141
669
20
1141
469
Annealed
OQT 700
OOT 900
OOT 1100
OOT 1300
4140
95
231
17
147
D18
655
1593
60
212
171
414
1462
1193
903
696
26
4140
4140
4140
4140
1289
1014
814
12
15
23
105
263
196
149
115
Oher propertie are approximately the same for all carbon
Modulus of clasticity in tension = 30 000 000 psi (207 GPa).
Modulus of elasticity in shear wIl 500 000 psi (80 GPa).
5160
5160
S160
5160
S160
Annealed
OQT 700
OQT 900
OOT I 100
724
1813
1351
1027
793
40
238
179
76
J641
1234
910
12
17
103
alky siecls
Deasity 0.253 th/a. (7680 kg/m'
OQT means ofl quenched and tempered. WOT mcans water quenched and tempered.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3e74b820-ac9b-4678-828a-bb567e122e7d%2F5d2deb39-7a85-4587-b935-47c08c14b425%2Fwaefm9i_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A-10 Typical properties of carbon and alloy steels
Ultimate strength, s
Yield strength.s
Percent
elongation
Material SAE no.
Condition
ksi.
MPa
MPa
1020
1020
Annealed
Hot rolled
Cold drawn
57
65
75
393
448
96
331
43
36
48
1020
64
441
20
1040
1040
1040
1040
1040
1040
1040
Annealed
Hot rolled
Cold drawn
WOT 700
WOT 900
WOT LI00
WQT 1300
75
90
97
127
118
107
517
621
669
876
814
738
600
352
414
565
641
621
552
434
51
60
82
30
25
16
91
90
80
1080
1080
1080
1080
1080
Annealed
OQT 700
OQT 900
OQT 100
ÖOT 1300
189
179
145
117
614
1303
1234
1000
807
54
141
129
103
70
372
972
889
710
483
1141
Annealed
Cold drawn
OQT 700
600
352
655
186
889
26
1141
12,
193
146
116
772
1331
1007
800
95
172
129
97
14
1141
1141
OQT L100
OQT 1300
1141
669
20
1141
469
Annealed
OQT 700
OOT 900
OOT 1100
OOT 1300
4140
95
231
17
147
D18
655
1593
60
212
171
414
1462
1193
903
696
26
4140
4140
4140
4140
1289
1014
814
12
15
23
105
263
196
149
115
Oher propertie are approximately the same for all carbon
Modulus of clasticity in tension = 30 000 000 psi (207 GPa).
Modulus of elasticity in shear wIl 500 000 psi (80 GPa).
5160
5160
S160
5160
S160
Annealed
OQT 700
OQT 900
OOT I 100
724
1813
1351
1027
793
40
238
179
76
J641
1234
910
12
17
103
alky siecls
Deasity 0.253 th/a. (7680 kg/m'
OQT means ofl quenched and tempered. WOT mcans water quenched and tempered.
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