Washer То- 20 °C В 20 mm Bolt A 20 mm diameter steel rod is held snugly (without stress) between rigid walls at room temperature To= 20 °C as shown in the figure. Determine the lowest temperature that...

Extracted text: Washer То- 20 °C В 20 mm Bolt A 20 mm diameter steel rod is held snugly (without stress) between rigid walls at room temperature To= 20 °C as shown in the figure. Determine the lowest temperature that the rod can be cooled if the allowable shear stress for the bolt at A is 45 MPa, the allowable normal stress for the rod is 75 MPa and the allowable stress in bearing for the washer is 60 MPa. The diameter of the bolt is di = 12 mm and the diameter of the washer is dw = 25 mm. For steel Et = 200 GPa and at 12 x 106/ °C.