Lay And Lay Length On The Mechanical Behavior Of Steel Cable Wire

The wire rope with a special space spiral structure belongs to metal twistingproduct, and it has the characteristics of high strength, flexibleness and stability.Wire rope is of fine twined steel wires, and the mechanical properties of the steelwire have a great influence on the mechanical properties of the whole wire rope.Therefore, to study the mechanical property of the steel wires and its influencefactors is very necessary.In this paper, the spatial geometry structure design theory and method ofwire rope are elaborated. At the same time, the double helix model of wire ropeand the wire curvature is discussed, respectively. And the spatial geometricequations of single helix wire and double helix wires are established.In this paper, the mechanical properties of the steel wires have beeninvestigated. The stretch, bend and torsion data of the wires are obtained by thestatic experiment of the wires (6×19S+FC,6×7+FC right regular lay and rightlang lay wire ropes). By mathematical statistical analysis of these data, the meanand variance of these data are obtained. And the influence of the lay ways onwire mechanical properties is investigated.In addition, the mechanical property and its influence factors of steel wirehave been investigated by numerical simulation method. The steel wire models(6×19S+FC,6×7+FC right regular lay and right lang lay wire ropes) areestablished by Solidworks soft-ware and ANSYS soft-ware, respectively. Theequivalent stress and strain of the wires are analyzed by ANSYS soft-ware. Andthe influence of the lay ways and lay length on wire mechanical properties isinvestigated, respectively.The results of experimental and numerical simulation show that, for the6×19S+FC and the6×7+FC wire rope, the right regular lay is better than theright lang lay in wire mechanical properties. Numerical results also show that,for the6×19S+FC and the6×7+FC right regular lay wire rope, when the laylength of strands is standard value and unchanged, the equivalent stress and equivalent strain value of the wires is minimum near its standard lay lengthvalue; but when the lay length of the wires is out of this area, no matter the laylength increase or decrease, the equivalent stress and equivalent strain value ofthe wires both will increases.