a) identify the beam ratio for the lever arm position on the oedometer.
For the VJ Tech (cream coloured) standard oedometer, the following ratios apply:
Position 1, 11.214:1
Position 2, 10.194:1
Position 3, 9.173:1
For the Clockhouse (green) standard oedometers, the beam ratio is 11.00:1
b) Calculate stress:
Stress kPa = (39,226.6 W R)/ (d2)
Where:
W = weight on hanger (in kg)
R = beam ratio
d = sample diameter (in mm)
 = 22/7 ~ 3.142

 

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