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A spring with end squared and ground, wire diameter d= 4 mm, outside diameter Do= 40...

Question:

A spring with end squared and ground, wire diameter d= 4 mm, outside diameter Do= 40 mm, 18 total coils, and free length Lf=

A spring with end squared and ground, wire diameter d= 4 mm, outside diameter Do= 40 mm, 18 total coils, and free length Lf= 140 mm has been chosen for an application where the initial deflection of 15 mm and the working deflection is 50 mm. Determine minimum working length. shut height, clash allowance, spring index and spring rate for this spring.

Answers

sol:- Given :- 40 mm Wire diametex, de Umm Outside diameter, Do = No. of coils, N=18 Free length, 2f = 140 mm Initial deflectNow, Yield shear strength is given by Sus=0.6 sut = 0.6 % 1361. 94918 Sus = 817.1695 MPa Assuming a factor of safety (f.0.3)Shut height is given by- Ls = dxN =uX 18 72 mm Ils Ane. s shut height Free length is given by- Lst Leash & Hot Hinitial Simil

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