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Solved: The square-threaded bolt is used to join two
Chapter 8, Problem 8-74(choose chapter or problem)
The square-threaded bolt is used to join two plates together. If the bolt has a mean diameter of d = 20 mm and a lead of l = 3 mm, determine the smallest torque M required to loosen the bolt if the tension in the bolt is T = 40 kN. The coefficient of static friction between the threads and the bolt is \(\mu_{\mathrm{s}}\) = 0.15.
Questions & Answers
QUESTION:
The square-threaded bolt is used to join two plates together. If the bolt has a mean diameter of d = 20 mm and a lead of l = 3 mm, determine the smallest torque M required to loosen the bolt if the tension in the bolt is T = 40 kN. The coefficient of static friction between the threads and the bolt is \(\mu_{\mathrm{s}}\) = 0.15.
ANSWER:
Step 1 of 5
Let's draw the free-body diagram of the screw.