| Practice Problem 7-4 (a) |
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Given: A force of P = 40 lb is applied to the handle of a pipe wrench to tightens a solid shaft into its socket. Let, d = 15 in., R = 1 in., and L = 20 in. Req'd: |
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Solution: If we replace the force acting on the wrench by a force and a moment at the pipe, we see that there is no axial force (in the x-direction) and only a torque about the x-axis. There are no other forces or moments acting at this point. Therefore equilibrium requires that the normal stress at A is ZERO. |
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