A stepped flat tension bar with shoulder fillet has dimensions $H=90mm,d=60mm,r=12mm$ and $h=9mm.$ An axial load $P=2700N$ is applied. Determine stress concentration factor using the appropriate chart and calculate the maximum tensile stress.

$(7$ mark

a$)$ A stepped flat tension bar with shoulder fillet has dimensions $H=90mm,d=60mm,r=12mm$ and $h=9mm.$ An axial load $P=2700N$ is applied. Determine stress concentration factor using the appropriate chart and calculate the maximum tensile stress.

$(7$ marks$)$

b$)$ A stepped flat tension bar of circular cross section with shoulder fillet has dimensions $D=80mm,d=40mm$ and $r=6mm.$ An axial load $P=6400N$ is applied. Determine stress concentration factor using the appropriate chart and calculate the maximum tensile stress.

$(7$ marks$)$