Question

A mild steel rod of diameter 25 mm and 400 mm long is incased centrally inside a hollow copper tube
of external diameter 35 mm and inside diameter 30 mm. The ends of the rod and tube are rigidly attached,
and the composite bar is subjected to an axial pull of 40kN. If E for steel and copper is 200GN/m2 and
100GN/m² respectively, find the stress developed in the rod and the tube. Find also the extension of the rod.​

Answer 1

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