Wahl factor to account for direct shear stress and stress concentration due to curvature for helical springs is given by,
a) (4C – 1/4C – 4) + 0.615/C
b) (4C – 1/4C + 4) + 0.615/C
c) (4C + 1/4C – 4) + 0.615/C
d) (4C + 1/4C + 4) + 0.615/C
Wahl factor to account for direct shear stress and stress concentration due to curvature for helical springs is given by,
a) (4C – 1/4C – 4) + 0.615/C
b) (4C – 1/4C + 4) + 0.615/C
c) (4C + 1/4C – 4) + 0.615/C
d) (4C + 1/4C + 4) + 0.615/C