고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.93

2.93 Knowing that, for the plate shown, the allowable stress is 125 MPa, determine the maximum allowable value of P when (a) r = 12 mm, (b) r = 18 mm. Given Data from Image: Width of wider section (\(D\)): 120 mm Width of narrower section (\(d\)): 60 mm Thickness of plate (\(t\)): 15 mm Allowable normal stress (\(\sigma_{all}\)): 125 MPa