For the assembly shown in the figure, determine the stress in each of the two vertical rods if the temperature rises 40 °C after the load P-50 kN is applied. Neglect the deformation and mass of the horizontal bar AB. Use Ea-70 GPa, α-23.0 um/m·°C, Aa-900 mm, E-200 GPa, α=0.7 um/m·°C, and A-600 mm.
Steel 4m
Aluminum 3m
3m
3m
3m 50 kN