On the bridge crane wire rope force characteristics

    overhead gantry crane  rope force complicated: under load, wire rope tensile stress generated, bending stress, compressive stress and twisting rope when residual stress. When the rope around the pulley when subjected to alternating stress, the metal material fatigue, and ultimately the rope with rope groove, wire rope wear and breakage between the test showed that:
   1 The radius of curvature of the wire rope great impact, because the sheave diameter is reduced, increasing the bending deformation of the wire, bending stress increase, thus rope accelerated wear, fatigue damage rate, the shorter the life of the rope;
   2 rope around the rope pulley,overhead bridge crane rope sheave contact surface with the pressure and relative sliding, so broken wire rope wear, the greater the contact stress, broken wire more quickly;
   3 point contact wire, as the wire contact stress between large wire cross and lateral pressure increases, the strength loss than the line-contact type, anti-fatigue performance is poor, so the contact wire rope rope long life than point contact;
   4 When the  steel crane  rope lay length between a number of broken wires up to 10% of all steel wire, to continue to use, broken wire rope significantly faster rate, short-term appears off shares;
   5 When other conditions are the same, the higher the coefficient selection rope safety, its service life is longer.