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 #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 #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 #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
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To need to answer condition #2 only
Transcribed Image Text: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 #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.
A-10 Typical properties of carbon and alloy steels
Ultimate strength, s,
Yield strength, s
Percent
Material SAE no.
Condition
ksi
elongation
MPa
ksi
MPa
1020
Annealed
Hot rolled
57
65
393
43
36
16
296
1020
48
64
331
1020
Cold drawn
75
S17
441
20
1040
Anncaled
Hot rolled
75
517
352
1040
30
621
414
25
1040
Cold drawn
669
97
127
118
107
82
565
16
WOT 700.
WOT 900
WOT LI00
WOT 1300
1040
876
814
93
641
621
1040
1040
738
80
552
24
1040
87
600
63
434
1080
1080
Annealed
89
614
54
372
25
OQT 700
OQT 900
OQT 1100
OOT 1300
189
1103
141
972
loso
1080
179
29
889
145
1000
103
710
17
23
1080
17
807
70
1141
Arinealed
87
352
655
600
51
26
1141
Cold drawn
772
1331
112
95
172
129
97
14
1141
OQT 700
193
146
186
1141
1007
889
1141
OOT H00
116
669
20
1141
OQT 1300
94
648
469
28
4140
Anncaled
OOT 700
95
655
60
212
173
131
414
26
12
4140
1593
1289
1014
231
1462
1191
903
696
4140
OOT 900
OOT I100
OOT 1300
187
15
4140
147
18
23
4140
118
814
101
5160
Annealed
OQT 700
OQT 900
OQT I 100
OQT 1300
Oher properties are approximately the same for all carbon and alloy steels
Modulus of casticity in tension = 30 000 000 psi (207 GPa).
Modulus of elasticity in shear l 500 000 psi (80 GPa).
724
105
263
276
1641
17
5160
1813
1351
1027
793
238
179
132
03
6.
5160
196
12
5160
149
910
710
5160
17
115
Deasity = 0.283 th An(7680 kg/m)
OOT means oil quenched and tempered. WOT means water quenched and tempered
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