(Solved): Required information Two solid cylindirical rods \( \mathrm{AB} \) and \( \mathrm{BC} \) are welded ...

Required information Two solid cylindirical rods \( \mathrm{AB} \) and \( \mathrm{BC} \) are welded together at \( \mathrm{B} \) and loaded as shown. Knowing that the magntiote of the average noimai stress must not enceed \( 135 \mathrm{MPe} \) in elther rod, determine the smallast allowable values of the diameters dt arid d2. Take \( P=55 \mathrm{kN} \) and \( Q=135 \mathrm{kN} \) Using FBDs/equilibelum equations for \( A B C \), cut sections between \( A B B \) and between \( B B C \), deteririne the (i) magnitude of the internal reaction force \( P_{A B}= \) (b) magnitude of the intemal reaction force \( \mathrm{PBC}_{\mathrm{B}}= \) kN. \( \mathrm{kN} \)