A strain gauge is mounted to the outer surface of a thin-walled boiler at point O, as illustrated in Figure 1. The boiler has an inside diameter of 1800 mm and a wall thickness of 20 mm, and it is...

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Extracted text: A strain gauge is mounted to the outer surface of a thin-walled boiler at point O, as illustrated in Figure 1. The boiler has an inside diameter of 1800 mm and a wall thickness of 20 mm, and it is made of stainless steel with the Young's modulus E= 200 GPa, Poisson's ratio v= 0.3 and yield stress dy = 350 MPa. (1) Determine the internal pressure of the boiler when the strain gauge reads 580 µɛ. (2) Determine the maximum shear strain in the boiler. (3) Determine the normal and shear stresses on the plane of 20° with the axis of the boiler. (4) According to the shear - strain energy theory, is the boiler safe? (5) Express the stresses at point O on the Mohr's circle. Strain gauge O 120°