Three solid bars, each with square cross sections, make up the axial assembly shown. Two loads of $P=38kN$ are applied to the

assembly at flange $B,$ two loads of $Q=19kN$ are applied at $C,$ and one load of $R=52kN$ is applied at end $D.$ The bar dimensions are $b_1=$

$81mm,b_2=27mm,$ and $b_3=54mm.$ Determine the normal stress in each bar.

Answer:

${}_1=$

${}_2=MPa$

${}_3=MPa$