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Problem 10-3 A helical compression spring is wound using 2.5- mm -diameter music wire. The spring has an outside...

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Mechanical Engineering

Problem
10-3
A helical compression spring is wound using 2.5-
mm
-diameter music wire. The spring has an outside diameter of31
mm with plain ground ends, and 14 total coils.
(a) Estimate the spring rate.
(b) What force is needed to compress this spring toclosure?
(c) What should the free length be to ensure that when thespring is compressed solid the torsional stress does not
exceed the yield strength?
(d) Is there a possibility that the spring might buckle inservice?

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