*Convert all dimensions from inches to meters* (all units are in inches in drawi
ID: 2994673 • Letter: #
Question
*Convert all dimensions from inches to meters* (all units are in inches in drawing)
In Lab #2, you applied a force, F, of 50 lbs (222 N) perpendicular to the top of the larger jaw. Assume that this force is applied directly above point A (see below). Consider the square bolt head with side length L (gray box below) that we are trying to turn with the wrench. L is equal to the width of the opening of the smaller jaw, 1 in. The eect of the wrench on the bolt can be modeled as shown in the free body diagram below. The wrench and bolt have a thickness of L=4.
(a) Determine the net moment M about the center of the bolt.
(b) Assuming that the bolt is incapable of producing a resistance force (i.e., the wrench and bolt turn at a constant velocity), determine F1 and F2.
(c) Determine the shear stress in the bolt head.
(d) In many applications, thread locker compound is applied to bolts to prevent loosening due to vibrations. How large must the resistance moment due to the thread locking compound be in order to prevent the nut from rotating under the applied force F?
Explanation / Answer
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