Determine the elongation of the square hollow bar when it is subjected to the axial force P = 100 kN. If this force is increased to P = 360 kN and released, find the permanent elongation of the bar. The bar is made of a metal alloy having a stress–strain diagram which can be approximated as shown.

Transcribed Image Text:

(MPa) 500 P 250 0.00125 0.05 600 mm (mm/mm) 50 mm 5 mm 50 mm 5mm