(Solved): 1. Figure 1 shows a rectangular bar is attached to a wall at one end with an axial force F = 20 kN a ...

1. Figure 1 shows a rectangular bar is attached to a wall at one end with an axial force F = 20 kN acting on the other end. The bar is made of 1050 cold-drawn steel, which has a yield strength of 580 MPa and an ultimate tensile strength of 690 MPa. There is a hole and and a notch along the length of the bar, as shown. The bar has a width w = 20 mm, an overall length 3L = 120 mm, and a thickness into the page t = 10 mm. The hole diameter is d = 4 mm, while the notch radius is r = 1.5 mm. The length between the notches is b = 17 mm.
a.)Find the nominal stress for the bar cross-section at the wall, at the hole and at the notch. By finding the static stress concentration factors, determine the maximum static stress at the hole and notch.

(b) Determine the fatigue stress-concentration factors at the hole and the wall, and use them to find the maximum fatigue stress at the hole and at the notch. You answers should be approximately ?hole = 287 MPa and ?notch = 249 MPa/ Note there may be some slight difference due to variation from reading plots but it should be within about ±10% or so.