A beam has a bending moment of 3.5 kN-m applied to a section with a hollow circular cross-section of the external diameter of 3.6 cm and an internal diameter of 2 cm. The modulus of elasticity for the material is 210 x 109 N/m2. Calculate the radius of curvature and maximum bending stress. Also, calculate the stress at the point at 0.5 cm from the neutral axis Solution: (i) The moment of inertia =  Answer and unit for part 1 ii) The radius of curvature is  Answer and unit for part 2 (iii) The maximum bending stress is Answer and unit for part 3 iv) The bending stress at the point 0.5 cm from the neutral axis  is

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