Question

This one is much easier than it appears. For this type of pressure vessel, the only pressure is exerted by the fluid on the walls. There is no sphereical end-cap. That means that if we neglect the weight of the pressure vessel (which is almost always the case) the axial stress is approximately zero. But as an additional complication, the value of the pressure p that we use in pr/t for the hoop stress varies with height. Hence the hoop stress will vary with depth, with the max at the bottom of the container. If you get this, it is a short problem. Answer 0.9188 mm, which we round up to 1 to be safe. 2.

Answer 1

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Water pressure, P- h P- A9.os KN/m2 ta thtckness Aq.DS kr|ro#x 1.5m/8oxo 3 kNjm 0.92 mm The mlntmwm wall thacknass,t 0-12 mm mm