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The bracket in Figure is subjected to a sinusoidal force time function with F max = F and F min = 0, where F and the beam's other data are

given in the row(s) assigned from Table. Find the stress states at points A and B due to this repeated loading and choose a ductile steel or aluminum material specification that will give a safety factor of 2 for infinite life if steel or N= 5E8 cycles if aluminum. Assume a geometric stress-concentration factor of 2.8 in bending and 3.2 in torsion.

Fig: 1

Fig: 2