Improvised Model for Estimation of Cable Bending Stiffness Under Various Slip Regimes

Analytical Estimation and Experimental Validation of the Bending Stiffness of the Transmission Line Conductors

“…A novel slip model that combines the macro and the micro slip phenomenon has been suggested and the cable bending stiffness has been evaluated for a single layered cable as a function of bending curvature and compared with the recent works of Khan [13]. A maximum reduction of 4.34 % in bending stiffness has been noticed with the present model for a cable axial load of 10 kN This paper is an extension of the analytical modeling of Hadiya [16]- [17] to a multilayered cable arrangement. The revised kinematic relations that include the 'wire stretch' effect have been extended to all the helical wires, placed in different layers of the strand, and the basic wire forces and moments have been accounted for with these improvised relations.…”

“…Noticing the above vital gap in cable bending research, Hadiya et al [16]- [17] brought out two publications in which a revised cable bending model had been suggested to estimate the bending stiffness. The first publication, Hadiya et al [16] included a parameter called 'wire stretch' that remains fundamentally in the straight wire before it takes successive stages of bending and twisting to form a helical path.…”

“…The slip caused by this additional deformation has also to be considered along with the usual slip that is estimated in the axial direction of the wire by Coulomb friction theory. While many authors have accounted for the axial slip due to Coulomb friction theory, Hadiya et al [17] considered for the first time in cable bending the slip caused by the radial contact forces and accounted for the slippage of the helical wire due to the Coulomb friction forces and the Hertzian contact forces. The slip due to Coulomb friction theory has been addressed as a macro slip and the one due to Hertzian contact theory has been addressed as a micro slip.…”