Unit Shaft Friction, f and End-Bearing, f / 16
b p
s
Calculated unit shaft friction, f and end-bearing, f b/p Field unit shaft friction, f and end-bearing, f b/p
s
s
K = Mobilised Skin Friction Factor
s
Vibrating Wire Strain Gauge
(VWSG)
P = ε (E A + E A )
s s
c c
f = (0.25ED∆ε)/L
s
f = P /A
b
b