CALCS PROC011
LOAD MONITORING SHEAR PIN

NOTATION

Ddiameter, nominal
rradius, groove, about circ. axis
hdepth, groove
ddiameter, axial hole
Pyforce, shear, transverse
Mzmoment, bending
Kfactors, scf constituents
kscf, bending
fbstress, bending
ksscf, shear
fsstress, shear

APPLICATION

Pins with axial hole & circumferential grooves giving rise to deliberate stress concentration for load monitoring purpose. Found as hinge and sheave pins.

OUTPUT

SFC Bending & Shear stresses

SEE ALSO

other porcs & progs

THEORY

Roark5, T37, I15b & T1, I11

GUIDANCE

Py & Mz are for an arbitrary cross section. The user must choose appropriate values having due regard for loading & support condition. Formulae for K1 to 4 vary with value of h/r ( .25to2 and 2to50 ).

INPUT FORMAT

LET Nm=:Nk=:D=:r=:h=:d=:Py=:Mz=:PROC011

EXAMPLE

Call Statement

LET Nm=1:Nk=1:D=6.5:r=.3:h=.6:d=2.5:Py=9.6:Mz=10.4:PROC011

Output

PROC011 LOAD MONITORING SHEAR PIN, Rev 200995
K1= +.935+1.922*SQR(h/r)+.004*h/r= 3.661
K2= -.552-5.327*SQR(h/r)+0.086*h/r= -7.914
K3= +.754+6.281*SQR(h/r)-.121*h/r= 9.395
K4= -.138-2.876*SQR(h/r)+0.031*h/r= -4.143
k= K1+K2*(2*h/D)+K3*(2*h/D)^2+K4*(2*h/D)^3= 2.494
fb= ABS(Mz)*k*(32*(D-2*h)/(PI*((D-2*h)^4-d^4)))= 1.867
ks= PI*((D-2*h)^2-d^2)/4*.4244*((D-2*h)^3-d^3)/16*64/(((D-2*h)^4-d^4)*(D-2*h-d))= 1.848
fs= ABS(Py)*ks*4/(PI*((D-2*h)^2-d^2))= 1.034
UF= fb/(Kb(Nk)*Fy(Nm))= 0.7963
UF= fs/(Ks(Nk)*Fy(Nm))= 0.7603
END011