Q6 [3 marks] An aluminium rod shown in (a) has a circular cross section and is subjected to an axial load of 10 kN. If a portion of the stress-strain diagram

is shown in (b), determine the approximate elongation of the rod when the load is applied. Take Eal = 70 GPa. σ (MPa) 56.6.60 50 Jy = 40 30 20 10 O 0.02 (b) 0.04 0.0450 0.06 10 kN 600 mm 20 mm (a) 15 mm 400 mm 10 kN