Question

(a) Derive the performance index of material selection, for a helical spring that can store as much energy as possible without plastic damage. The spring is subjected to a load (F₀) varying from 1000 N to 2000 N. The coil radius, R, must be around 10 cm. There should not be more than 100 turns of coils. (b) List top 3 candidates.

Answer 1

​​​​​​