Study on Section Stiffness, Poisson Ratio and Mechanism Characteristics of Large Cross-sectional Aluminum-steel Stranded Conductor

Aimed at the geometrical characteristics of the overall discrete of large cross-sectional aluminum-steel stranded conductor, combined with the composite properties of conductor material made of aluminum and steel, the mechanism characteristics of large cross-sectional aluminum-steel stranded conductor are studied in this paper from surface to inside, by the individual to the whole and by the same to the different. The principal stiffness, coupling stiffness and modulus of elasticity of aluminum-steel stranded conductor are analyzed and given by using the continuity and the same nature of strand and synthesizing tension, torsion, shear and bending etc factors. Simplified results and formulas for engineers also given in this paper. All kinds of stiffness are not only the need of the mechanical calculation of conducting wire and the design overhead transmission lines but also the contents which fill the gaps in china. Especially the optimized conclusion that the section stiffness of wire is asymmetric is innovative and the general conclusion is that the section stiffness is different with the change of cross-section location. Although optimization can eliminate their differences, but can not change the fact that the stiffness is asymmetry. The results of this paper also have practical value for various types of lifting wire rope and the current steel configuration. (C) 2012 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Hainan University.