Let the curved beam in Problem 9.5 be made of a steel that has a flat-top stress-strain di...

Let the curved beam in Problem 9.5 be made of a steel that has a flat-top stress-strain diagram at the yield stress Y = 430 MPa. From the answer to Problem 9.5, the load that initiates yielding is equal to PY = SF(P)= 6.05 kN. Since D = 3h, assume M = Mp and calculate Pp. Determine the ratio Pp/Py.

Problem 9.5

The frame shown in Figure E9.1 has a rectangular cross section with a thickness of 10 mm and depth of 40 mm. The load P is located 120 mm from the centroid of section BC. The frame is made of steel having a yield stress of Y = 430 MPa. The frame has been designed using a factor of safety of SF = 1.75 against initiation of yielding. Determine the maximum allowable magnitude of P, if the radius of curvature at section BC is R = 40 mm.

FIGURE E9.1