Consider the two cases shown below. In case (1), a 30 mm square bar is subject t
ID: 1856806 • Letter: C
Question
Consider the two cases shown below. In case (1), a 30 mm square bar is subject to axial load P. IN case (2), the bar is nominally 35 mm by 30 mm, but is notched with 2.5 mm radius grooves such that the cross section at the notched location is also 30 mm square. Both bars were machined from normalized AISI 1050 steel. For each bar, a) estimate the static tensile load P that will causes fracture, and b) estimate the alternating axial load -,+ P that will cause eventual fatigue failure in 50% of such bars.