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A compressed air tank is supported by two cradles as shown in Figure 1.2. The thin cylindrical body of the tank has a 750 mm outer diameter and is fabricated from a 12 mm steel plate by butt welding along a helix that forms an angle of 25° with a transverse plane. The end caps are spherical and have a uniform thickness of 10 mm. For an internal pressure of 1.3 MPa, determine: 1. The normal stress and the maximum shearing stress in the spherical caps. 2. The stresses at the weld in directions perpendicular and parallel to the helical weld.
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The outer diameter of the tank is given as 750 mm, so the outer radius \( r \) is half of that: \[ r = \frac{750 \text{ mm}}{2} = 375 \text{ mm} \] Show more…
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