Effect of interfacial contact forces in radial contact wire strand

Abstract

A new mathematical model has been developed to predict the behaviour of a stranded cable assembly under the influence of interfacial radial contact forces and radial contraction of the core. A single layered cable assembly with six helical wires and a straight cylindrical core, all made with the same material, Steel has been chosen to explain this phenomenon when the assembly is under the influence of core-wire radial contact. An attempt is made in this paper to model the strand with a radial (core-wire) contact and deduce its equations of equilibrium. Numerical analysis of strand force, twisting moment, strand stiffness, contact force and contact stresses is carriedout based on the equilibrium of thin rods, and the results are compared with the earlier research work. The importance of the inclusion of interfacial forces at the contact locations and their associated effects of axial and twist slip of the helical wires on the core, is highlighted. The behaviour of the stranded cable assembly due to the contact force in the radial direction and its associated effects on the axial strain of the core due to Poisson's effect is one more additional feature incorporated in the present work.

A finite element method of modelling and designing of an ACCC conductor

“…In this model, the rod length is set to 43.2mm which approximates to a quarter of the wire pitch, the outer diameter of the wire is 18.29 mm, and the diameter of the inner composite core is 5.97 mm. Specific geometrical parameters of the JRLX/T wire are listed in Table 1 [16], and the specific mechanical properties of the JRLX/T wire are shown in Table 2. In general, the geometrical modelling process of the JRLX/T wire is based on a bottom-top method, which mainly includes four steps as follows:…”

“…After meshing the finite element model (20,400 8-noded elements are generated), we set contact pairs between the composite mandrel and the inner aluminum strands, as well as contact pairs between the inner and outer layer of aluminum strands [16], which is well matched with the true conditions. As the ACCC rod are meshed with threedimensional solid185 elements, the types of contact elements are set as flexible three-dimensional TARGE170 and CONTA174.…”

Influence of wire’s surface topography on interwire contact performance of simple spiral strand

“…On the basis of the thin rods theory, Gnanavel et al (2010) classified the contact behaviors of a simple spiral strand subjected to a traction load into coupled, core-wire and wire-wire contact, respectively. And the fact that the core-wire contact associates the effects of axial and twist slip of the helical wires on the core was highlighted by Gnanavel and Parthasarathy (2011). Jiang and Henshall (1999) proposed a concise finite element model for the simple spiral strand and found the influence of termination effect for the strand on the interwire contact force and contact pressure mainly occurring at the contact lines.…”

A Beam Finite Element Model for Efficient Analysis of Wire Strands

“…In the last several decades, considerable progress has been made in the development of theories and models to study the mechanical behavior of wire strands. Literature survey shows that analytical models are commonly applied to relatively simple cases in which approximations and assumptions have been made [1][2][3][4][5]. The effects of more complicated factors such as contact deformation, wire uneven bending due to discontinuous contacts and material plasticity, etc., are very difficult to predict analytically.…”