A safety clutch with shear pins in Figure 1 transmits a torque of T = 500 N-m. The clutch has tve identical pins on the circle of diameter of Dm = 100 mm. Pins are made of medium carbon steel and normalized, with an allowable stress of [7] = 400 MPa. It is required the safety clutch function at 50% of overload. Decide the diameter of the pins. 18 marks] D. Figure 1 Safety Clutch.