MS16629E
(f) VIBRATION = A RETAINING RING WILL BE SECURE AGAINST VIBRATION IF ITS SHEAR FATIGUE STRENGTH EQUALS OR EXCEEDS THE FORCE CREATED BY THE MASS OF THE PART BEING REPEATEDLY ACCELERATED AGAINST THE RING.
(1) SHEAR STRENGTH OF RING (CRITICAL). (ABUTTING COMPONENTS TO HAVE SHARP CORNERS).
XT 1.1 H � W a X = ULTIMATE SHEAR STRENGTH OF RING MATERIAL (PSI) 1/
g T = RING THICKNESS (INCHES)
WHERE: H = HOUSING DIAMETER (INCHES)
OR FOR HARMONIC MOTION W = WEIGHT OF ABUTTING PARTS (POUNDS)
2 a = δω
2
XT 1.1 H � W δω
g
2 g = ACCELERATION DUE TO GRAVITY (IN/SEC )
δ = AMPLITUDE OF VIBRATION (INCHES)
ω = ANGULAR SPEED (RAD/SEC)
2 a = ACCELERATION (IN.SEC )
(2) COMPRESSIVE STRENGTH OF GROOVE MATERIAL (CRITICAL) =
2
1.65YdH � W δω
WHERE: Y = YIELD STRENGTH IN COMPRESSION OF THE GROOVE
g MATERIAL. (PSI)
d = GROOVE DEPTH (INCHES)
OTHER SYMBOLS AS SHOWN IN (1) ABOVE
(g) IMPACT CAPACITY OF RING OR GROOVE WALL =
IR = PT FOR THE RING (INCH POUNDS) (ABUTTING COMPONENTS TO HAVE SHARP CORNERS)
2
I Pd
G = 2
FOR THE GROOVE (INCH POUNDS)
WHERE:
P = ALLOWABLE THRUST LOAD OF RING OR GROOVE (POUNDS) T = RING THICKNESS (INCHES)
I
G = IMPACT CAPACITY OF GROOVE WALL (INCH POUNDS)
d = GROOVE DEPTH (INCHES)
I
R = IMPACT CAPACITY OF RING (INCH POUNDS)
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