Effect of pre tensioning of steel wire rope
● when the steel wire rope is pretensioned, the elongation caused by the adjustment of the steel wire in the strand and the position of each strand in the steel wire rope can be basically eliminated. The method is to apply a certain load and stretch repeatedly until the structural elongation of the steel wire rope is eliminated.
● elimination of twisting stress: there will be certain residual stress in the steel wire rope strand and the steel wire in the strand after twisting. The twisting stress can be eliminated to a great extent through pre tensioning.
● uniform stress of strands and steel wires: due to the non-uniformity of twisting, the stress of strands or steel wires is uneven when the steel wire rope is loaded. The stress can be uniform through pre tensioning.
● improve fatigue life: due to the elimination of twisting stress and uniform stress, the fatigue life of steel wire rope can be improved to a certain extent.