steel rod of 3cm diameter is enclosed centrally in a hollow copper tube of external diameter of

4cm. The composite bar is ten subjected to an axial pull of 45000 N. If the length of each bar is

equal to 15cm, determine.

(i) The stresses in the rod and tube, and

(ii) Load carried by each bar

Take E for steel = 2.1 x 105 N/mm2

and for copper = 1.1 x 105 N/mm2

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