A steel rod of 15-mm diameter is held snugly (but without any initial stresses) between rigid walls by the arrangement shown in the figure part a. (For the steel rod, use = 1210-6 /0C and E = 200 GPa.)
(a) Calculate the temperature drop T (degrees Celsius) at which the average shear stress in the 12-mm diameter bolt becomes 45 MPa. Also, what is the normal stress in the rod?
(b) What are the average bearing stresses in the bolt and clevis at A and between the washer (d w =20 mm) and wall (t =18 mm) at B?
(c) If the connection to the wall at B is changed to an end plate with two bolts (see figure part b), what is the required diameter db of each bolt if the temperature drop is T = 380 C and the allowable bolt stress is 90 MPa?
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