a$)$ For the structure shown above, assume the temperature increases by $T=100C.$ Find the axial stress and strain, $$ and $,$ in the bar.

b$)$ For the structure shown above, assume the temperature increases by $T=200C.$ Find the axial stress and strain, $$ and $,$ in the bar.

Answers

a$)=0$MPa,$=0\mathrm{.}00120$

b$)=-154$MPa,$=0\mathrm{.}00167$