D R A F T

This is an unapproved Kinectrics International Draft Report, subject to change
Step
Whole Conductor RTS=
20,357 kgf
Whole Conductor
Elongation, mm kgf lbs
Hold
(minutes)
preload 0 407 898
1 11.79 - - 30
2 - 407 898 1
3 21.78 - - 60
4 - 407 898 1
5 35.95 - - 60
6 - 407 898 1
7 51.49 - - 60
8 - 407 898 1
The completion of Step 8 of the above loading schedule constituted the completion of the
Stress-Strain Test.
5.0 TEST RESULTS
The strain data for the conductor and core have been corrected because the elongation
measurement was taken to be zero at the preload. Using a straight-line regression of the stressstrain
data while loading up to 30% RTS it was calculated that the corrected strain at preload was
+0.0032% for the conductor and +0.0291% for the steel core. After accounting for these
corrections, the data was extrapolated to the Y-axis to zero. The corrected data was the actual
conductor’s behaviour because the conductor will have zero elongation only when it is under zero
tension.
Figures 3a and 3b show load (i.e. tension) plotted against all strain data for the whole conductor
and steel core, respectively.
Figures 4a and 4b show stress plotted against strain (%) for only those points that contribute to the
stress-strain curve for the whole conductor and steel core, respectively.
DRAFT
Figure 5 shows the stress-strain curve for the PHEASANT ACSR conductor showing the plots for
the whole conductor, the aluminium layers, and the steel core.
The area of the conductor was 726.79 mm 2 according to the cable data sheet, included in
Appendix A.
The stress-strain curve for the aluminium layers is calculated by subtracting corresponding data
points of the steel core from the whole conductor.
The Modulus of Elasticity (MOE) of the conductor can be determined from the Stress-Strain
curve. The MOE is the slope of the unloading segment of the 85% RTS curve. The MOE for
the conductor is approximately 72,973 MPa.
Similarly, the MOE of the steel core can also be determined from the unloading curve on the
core only Stress-Strain curve. The MOE for the steel core (based on the area of the steel core
only) is approximately 187,471 MPa. The MOE for the steel core (based on the area of the
whole conductor) is approximately 21,077 MPa.
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