Question

14.6. Find the column loads which may be resisted by round steel tubes, heat-treated to an ultimate tensile strength of 180,000 psi, with the ends welded before heat-treatment. The dimensions are as follows: TABLE 14.5 Tube size 1 X 0.058 1% X 0.049 1 ½ × 0.065 × 0.058 20 20 40 30 4

Answer 1

In this solution some basic concepts of Solid Mechanics are used. Please refer to any standard textbook for more information or drop a comment below. Please give a positive rating if solution is helpful.

Solution :

The Formulas used in this solution are as follows,

부 ||inner clici (di) マ ·da ← 2t 6 H Ty A- Pe

Now after pulgging in all the given values, (Assuming them in inches) we would get following results for each case,

Size Outer Diameter (Do) Thickness (t) Inner Diameter (Di) Area Moment (lx) Area (A) 4 1 X0.058 1.125 X 0.049 1.5 X 0.065 1.25 X 0.058 1.125 1.5 1.25 0.058 0.049 0.065 0.058 0.884 1.027 1.37 1.134 0.0490625 0.078588638 0.248378906 0.119781494 0.17155704 0.16555336 0.2928835 0.21708704 0.534774345 0.688986769 0.920894549 0.742810296 10 Size Area Bearing Load Length(Le) Le/k Strength Load (Pe) 12 13 14 15 1.125 X 0.049 16 17 18 0.17155704 0.16555336 0.2928835 0.21708704 20 20 40 30 37.39895186 29.02813361 43.43602646 40.38716235 180000 180000 180000 180000 1 x0.058 11.03511767 8.838599492 27.92782439 11.97447879 1.5 X 0.065 1.25 X 0.058

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