Tension-torsion measurements were made with applied strain on ACSR, AACSR,ACAR, aluminum and aluminum alloy conductors, as well as on groundwires. Results were compared with predictions of a model based on mechanical properties of constituent wires and the geometry of the multistrand cable. True tensile strength of each cable was predicted accurately. Deviations were found in the torque values of cables containing galvanized steel strands. Interstrand friction, not considered in the model, is thought to be responsible for the deviation. Frictionless interaction of strands was found to be a reasonable approximation for aluminum and aluminum alloy stands.
Issue Section:
Technical Papers
1.
Akhtar
A.
1988
, “Localized Intrinsic Strengthening Approach (LISA): A Practical Method for Determining the Tensile Strength of Multistrand Cables
,” ASTM Journal of Testing and Evaluation
, Vol. 16
, pp. 124
–133
.2.
American Society for Testing and Materials (ASTM), 1981, “Concentric Lay Stranded Aluminum Conductors Coated Steel Reinforced (ACSR),” Standard B232–81.
3.
Canadian Standards Association (CAN/CSA), 1987, “Round Wire Concentric Lay Overhead Electrical Conductors,” Standard C49.1-M87.
4.
Cisco, G. J., and Phillips, J. W., 1986, “A Tension-Torsion Load Cell for Wire Rope,” Experimental Techniques, Dec., pp. 18–20.
5.
Deresiewicz
H.
1954
, “Contact of Elastic Spheres Under an Oscillating Torsional Couple
,” ASME Journal of Applied Mechanics
, Vol. 21
, pp. 52
–56
.6.
International Electrotechnical Commission, 1991, “Round Wire Concentric Lay Overhead Electrical Stranded Conductors,” Standard 1098.
7.
Johnson, K. L., 1985, Contact Mechanics—Chapter 7—Tangential Loading and Sliding Contact, Cambridge University Press.
8.
Knapp
R. H.
1979
, “Derivation of a New Stiffness Matrix for Helically Armoured Cables Considering Tension and Torsion
,”J. of Numerical Methods in Engineering
, Vol. 14
, pp. 515
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.9.
Lanteigne
J.
1985
, “Theoretical Estimation of the Response of Helically Armoured Cables to Tension, Torsion and Bending
,” ASME Journal of Applied Mechanics
, Vol. 52
, pp. 423
–432
.10.
Lanteigne, J., and Akhtar, A., 1997, “Evaluation of Tensile Strength of Multistrand Conductors—Part I: Theoretical Basis,” ASME JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY, published in this issue, pp. 33–45.
11.
McConnell
K. G.
Zemke
W. P.
1982
, “A Model to Predict the Coupled Axial Torsion Properties of ACSR Electrical Conductors
,” Experimental Mechanics
, Vol. 22
, pp. 237
–244
.12.
Mindlin
R. D.
1949
, “Compliance of Elastic Bodies in Contact
,” ASME Journal of Applied Mechanics
, Vol. 16
, pp. 259
–268
.13.
Phillips
J. W.
Costello
G. A.
1985
, “Analysis of Wire Ropes with Internal Wire Rope Cores
,” ASME Journal of Applied Mechanics
, Vol. 52
, pp. 510
–516
.14.
Ramsey
H.
1988
, “A Theory of Thin Rods with Application to Helical Constituent Wires in Cables
,” Int. Journal of Mech. Sci.
, Vol. 30
, pp. 559
–570
.15.
Ramsey
H.
1990
, “Analysis of Interwire Friction in Multistrand Cables Under Uniform Extension and Twisting
,” Int. J. of Mech. Sci.
, Vol. 32
, pp. 709
–716
.16.
Raoof
M.
Hobbs
R. E.
1988
, “The Analysis of Multilayered Structural Strands
,” ASCE J. of Engrg. Mech.
, Vol. 114
, pp. 1166
–1182
.17.
Satikh
S.
Moorthy
M. B. K.
Krishnan
M.
1996
, “A Symmetric-Linear Elastic Model for Helical Wire Strands Under Axisymmetric-Loads
,” J. of Strain Analysis
, Vol. 31
, pp. 389
–399
.18.
Utting
W. S.
Jones
N.
1987
a, “The Response of Wire Rope Strands to Axial Tensile Loads—Part 1: Experimental Results and Theoretical Predictions and Part 2: Comparison of Experimental Results and Theoretical Predictions
,” Int. J. Mech. Sci.
, Vol. 29
, pp. 605
–636
.19.
Utting, W. S., and Jones, N., 1987b, “Wire Tension and Bending Moments in Axially Loaded Seven Wire Strand,” Strain, Aug. pp. 109–116.
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