In Problem, let it be assumed that the threads stop immediately above the nut.
The bolt in Fig. 5-8 is 20 mm in diameter with a pitch of 2.5 mm and is made from 1137 cold-drawn steel. Threads are machined. σult = 105,000 psi = 724 MPa, σyp = 90,000 psi = 621 MPa, and σe = 39,000 psi = 269 MPa, Fs = 2.5; K = 3.85. Area of the steel part is 700 mm2. Initial force Fo = 34,000 N. If the average stress in the root area is 170 MPa, find the maximum and minimum values of the varying load P on the part.
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