b$\backslash$alpha $\_($steel $)=1\mathrm{.}7\backslash$times $(10^(-6))/(\backslash$deg $)$C and

brass a$\_($brass $)=18\mathrm{.}7\backslash$times $(10^(-6))/(\backslash$deg $)$C$.$ If both rods in Figure $2$ are initially unstressed, determine

the Normal Stress induced in portions AC and CE$,$ by a temperature rise of $45\backslash$deg C$80$kN$,50$kN and $40$ kN

forces