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Q7. A 1.75 m long steel tube, 4 mm thick with external diameter of 35 mm is simply supported 130 mm from either end. It is loaded with 1.3 kN point loads at both ends.

Neglecting the weight of the tube:

(a) sketch the shear force and bending moment diagrams. (6)

(b) calculate EACH of the following:

(i) the radius of curvature of the tube at mid-span position. (6)

(ii) the shearing stress induced at either support. (4)

Note:

Modulus of Elasticity for steel = 206 GN/m²