Work Problem 1(a), but find the Fs for an element at the wall at midheight on the surface...

Work Problem 1(a), but find the Fs for an element at the wall at midheight on the surface of the shaft on the side toward the observer.

Problem 1

The hollow cylinder in Fig. 1 is fixed at the wall and has an outer diameter (OD) of 150 mm. and an inner diameter (ID) of 113 mm. Stress concentration factor at wall is equal to 3.

(a) Find value of Fs if material is cast iron, σult = 172 MPa, σuc = 690 MPa.