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Question 2.2: A hollow pipe of inside diameter 40 mm and outside diameter ......

A hollow pipe of inside diameter 40 mm and outside diameter 50 mm is compressed by an axial force of 55 kN. Calculate compressive stress in the material of the pipe.

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This problem is also straightforward as the previous one. The problem is sketched in Figure 2.16.

The resisting area is (annular portion) =\frac{\pi}{4}\left(50^2-40^2\right)

= 706.85 mm²

The normal stress =\sigma=\frac{55 \times 10^3}{706.85}

= 77.80 N/mm².

2.16

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