Class exercise $4\mathrm{.}3$

The composite rod shown is restrained axially and heated through $20C.$

$E_{Al}=70$GPa,$E_{br}=95$GPa

$A_{Al}=9mm2,A_{br}=6mm2$

${}_{Al}=12\mathrm{.}8\frac{}{}C,{}_{br}=10\mathrm{.}4\frac{}{}C$

Calculate the stresses induced in each material.