The hollow cylinder in Fig. 1 is fixed at the wall and has an outer diameter (OD) of 150 m...

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.

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(b) Find value of Fs if material is ductile with a steady load and σyp = 345 MPa.

Figure 1