engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Strength of Materials Springs Stress Correction Factor
A Wahl's stress factor (Ks) is: (where C spring index)
1
\(\left( \frac{4C - 1}{4C - 4}+ \frac{0.615}{C} \right)\)
2
\(\left( \frac{4C + 1}{4C + 4}+ \frac{0.615}{2C} \right)\)
3
\(\left( \frac{4C - 1}{4C + 4}+ \frac{0.615}{C} \right)\)
4
\(\left( \frac{4C + 1}{4C - 4}+ \frac{0.615}{C} \right)\)