Fig $11$ Problems $35-38$

Problem $35(5$ pts$)$ Given that Bar AB has $d=12\mathrm{.}5mm,L=75mm,$ the gap, $t=0\mathrm{.}500mm,E$

$=100$GPa,$G=39\mathrm{.}0$GPa,$=21\mathrm{.}0\frac{{10}^{-6}}{}C,$ and that the dimensions of

the rigid frame do not change. Find the axial normal strain, $$ in the bar if

the temperature is increased from $20\mathrm{.}0C$ to $300C.$

A$)=0\mathrm{.}411$

B$)=0\mathrm{.}00588$

C$)=0\mathrm{.}00630$

D$)=0$

E$)$ None of the above

Problem $36(5$ pts $)$ Given that Bar AB has $d=12\mathrm{.}5mm,L=75mm,$ the gap, $t=0\mathrm{.}500mm,E$

$=100$GPa,$G=39\mathrm{.}0$GPa,$=21\mathrm{.}0\frac{{10}^{-6}}{}C,$ and that the dimensions of

the rigid frame do not change. Find the axial normal stress, $,$ in the bar if

the temperature is increased from $20\mathrm{.}0C$ to $300C.$

A$)=0$

B$)=-588$MPa

C$)=-630$MPa

D$)=229$MPa

E$)$ None of the above