Design an infinite-life helical coil extension spring with
Chapter 10, Problem 10.37(choose chapter or problem)
Design an infinite-life helical coil extension spring with full end loops and generous loop-bend radii for a minimum load of 9 lbf and a maximum load of 18 lbf, with an accompanying stretch of 1 4 in. The spring is for food-service equipment and must be stainless steel. The outside diameter of the coil cannot exceed 1 in, and the free length cannot exceed 21 2 in. Using a fatigue design factor of nf 5 2, complete the design. Use the Gerber criterion with Table 108
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