The shear stress concentration factor (Ks) in mechanical springs is given as _____

[(4C – 1) / (4C + 1)] + [0.615 / C]

The shear stress concentration factor (Ks) in mechanical spr

1.	The shear stress concentration factor (Ks) in mechanical springs is given as _____
A.	(1 + 0.5 / C)
B.	0.615 / C
C.	(1 + 0.615 / C)
D.	[(4C – 1) / (4C + 1)] + [0.615 / C]
Answer» D. [(4C – 1) / (4C + 1)] + [0.615 / C]