2.3. Stability analysis of a compressed bar
Design a given cross-section for a compressed bar according to the scheme (fig. 8). Take the necessary data from Table 11 and Table 12.
Table 11
Row number |
Materials |
y (0,2), MPa |
u, MPa |
[σ], MPa |
Factors, MPa |
λlim |
λ0 |
|
a |
b |
|||||||
1 |
Steel 15ХСНД |
350 |
520 |
250 |
469 |
2,62 |
85 |
50 |
2 |
ДІ6Т |
330 |
470 |
250 |
400 |
3,33 |
60 |
30 |
3 |
Steel 20 |
240 |
420 |
160 |
310 |
1,14 |
100 |
61 |
4 |
АВТІ |
260 |
310 |
170 |
315 |
1,50 |
55 |
35 |
5 |
Steel 35 |
320 |
540 |
220 |
420 |
2,00 |
90 |
50 |
6 |
Steel 25 |
260 |
440 |
180 |
343 |
1,42 |
95 |
60 |
7 |
АМг П |
210 |
250 |
120 |
254 |
1,35 |
62 |
40 |
8 |
Steel 45 |
280 |
550 |
200 |
348 |
1,42 |
90 |
55 |
9 |
АМг М |
100 |
190 |
70 |
130 |
0,60 |
100 |
50 |
10 |
Steel 14Г2 |
330 |
470 |
230 |
469 |
2,62 |
85 |
50 |
Table 12
Variant |
Force F, kN |
Length l, m |
|
Variant |
Force F, kN |
Length l, m |
|
Variant |
Force F, kN |
Length l, m |
1 |
10 |
2,1 |
11 |
30 |
2,7 |
21 |
10 |
2,1 |
||
2 |
12 |
2.3 |
12 |
11 |
2,0 |
22 |
12 |
2,3 |
||
3 |
14 |
2,5 |
13 |
13 |
2,2 |
23 |
14 |
2,5 |
||
4 |
16 |
2,7 |
14 |
15 |
2,4 |
24 |
16 |
2,7 |
||
5 |
18 |
2,9 |
15 |
17 |
2,6 |
25 |
18 |
2,9 |
||
6 |
20 |
3,1 |
16 |
19 |
2,8 |
26 |
20 |
3,1 |
||
7 |
22 |
2,0 |
17 |
21 |
3,0 |
27 |
22 |
2,0 |
||
8 |
24 |
2,1 |
18 |
23 |
2,0 |
28 |
24 |
2,1 |
||
9 |
26 |
2,3 |
19 |
25 |
2,2 |
29 |
26 |
2,3 |
||
10 |
28 |
2,5 |
20 |
27 |
2,4 |
30 |
28 |
2,5 |
Fig. 8. (see also p. 34)
Fig. 8. Continued (see also p. 35)
Fig. 8. Ending