A helical compression spring is wound using 4 mm-diameter Chrome-vanadium wire. The spring has an outside diameter of 28 mm with squared and ground ends, and 14 total coils: (a) What should the free length be to ensure that when the spring is compressed solid the torsional stress does not exceed the yield strength, that is, that it is solid-safe? (b) What force is needed to compress this spring to closure? (c) Estimate the spring rate.

A helical compression spring is wound using 4 mm-diameter Chrome-vanadium wire. The spring has an outside diameter of 28 mm with squared and ground ends, and 14 total coils: (a) What should the free length be to ensure that when the spring is compressed solid the torsional stress does not exceed the yield strength, that is, that it is solid-safe? (b) What force is needed to compress this spring to closure? (c) Estimate the spring rate.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A helical compression spring is wound using 4 mm-diameter
Chrome-vanadium wire. The spring has an outside diameter of 28
mm with squared and ground ends, and 14 total coils:
(a) What should the free length be to ensure that when the spring
is compressed solid the torsional stress does not exceed the yield
strength, that is, that it is solid-safe?
(b) What force is needed to compress this spring to closure?
(c) Estimate the spring rate.
(d ) Is there a possibility that the spring might buckle in service?

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