A steel rod \(20 \mathrm{~mm}\) diameter is passed through a brass tube \(25 \mathrm{~mm}\) internal diameter and \(30 \mathrm{~mm}\) external diameter. The tube is \(1 \mathrm{~m}\) long and is closed by thin rigid washers and fastened by nuts, screwed to the rod, as shown in Fig. 13.28. the nuts are tightened until the compressive force in the tube is \(5 \mathrm{kN}\). Calcutate the stresses in the rod and the tuble. \(E_{s}=200 \mathrm{GPa}, E_{b}=80 \mathrm{GPa}\).

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Washer Brass tube Steel rod Nut -20-25- 30mm 1 m Fig. 13.28