Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Q(1) :A helical compression spring is to be cycled between 150 lbf and 300 lbf with a 1-in stroke.The number of cycles is low, so fatigue is not an issue. The coil must fit in a 2.1-in diameter hole with a 0.1-in clearance all the way around the spring. Use unpeened oil tempered wire with squared and ground ends. (CLO1)
(i) Determine a suitable wire diameter, using a spring index of C=7.
(ii) Determine a suitable mean coil diameter.
(iii) Determine the necessary spring constant.
(iv) Determine a suitable total number of coils.
(v) Determine the necessary free length so that if the spring were compressed to its solid length, there would be no yielding.
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