Snap ring groove stress concentration factors
Snap ring groove stress concentration factors
(OP)
Power transmission shafting on conveying equipment that was purchased from a sub-contractor is failing at a snap ring
groove. The snap ring grooves are used to position a drive
sprocket on the shaft.
I need to check our sub's shaft design but can't find a
source for snap ring groove stress concentration factors.
Does anyone know of a source?
groove. The snap ring grooves are used to position a drive
sprocket on the shaft.
I need to check our sub's shaft design but can't find a
source for snap ring groove stress concentration factors.
Does anyone know of a source?





RE: Snap ring groove stress concentration factors
PP844 Table A-26-15, Charts of theoretical Stress-Concentration Factor Kt, Brooved round bar in Torsion.
If you give the Dia, Groove Dia, groove radia i'll look it up for you.
RE: Snap ring groove stress concentration factors
RE: Snap ring groove stress concentration factors
I don't believe the stress concentration factors for a grooved shaft that you cited apply. In those cases the inside radius of the groove is 1/2 the groove width.
In the case of the snap ring groove in question the groove width is 1.85mm and the inside radius of the groove is 0.2mm.
RE: Snap ring groove stress concentration factors
RE: Snap ring groove stress concentration factors
Shaft diameters are found using
d = [ (5.1/ Smax )((KmM)² + (KsT)² )1/2]1/3
d = shaft diameter, in.
H.P. = horsepower
Km = shock factor for bending loads
Ks = shock factor for torsional loads
M = bending moment, In-lbs.
N = revolutions per minute (RPM)
S = shear stress, lbs/in²
Smax = maximum allowable shear stress, lbs/in²
T = torque, in-lbs.
Tmax = maximum allowable torque, In-lbs
SHOCK FACTORS VS. TYPE OF LOAD
Type of Load Km Ks
Gradually applied load 1.0 1.0
Minor shocks,sudden load 1.4—2.0 1.0—1.5
Heavy shocks,heavy loads 2.0—3.0 1.5—3.0
Consider the fatique strength and the Groove Stress Concentration Kt reduction in the Smax
RE: Snap ring groove stress concentration factors
RE: Snap ring groove stress concentration factors
d = [ (5.1/ Smax )((KmM)² + (KsT)² )**1/2]**1/3
RE: Snap ring groove stress concentration factors
http://search.barnesandnoble.com/textbooks/booksearch/isbnInquiry.asp?userid=2VVRX7DFPJ&isbn=0471538493&TXT=Y&itm=4
RE: Snap ring groove stress concentration factors