Study On Mechanical Characteristics And Frictional Wear Evolution Of A Multi-layer Structured Wire Rope

As an important component to transfer tension,multi-layer structure wire rope are widely used in the engineering operations of ships and shipping,such as port hoisting,ship towing and Cargo handling,as well as the key components in the industries of Bridges,construction and mining.multi-layer structure wire rope work in a variety of environments,so problems such as collision,friction and hinge between objects often exist in its work.In addition,due to the complex spatial twist,various forms of inter-wire contact,a wide range of coupling between forces and other characteristics of the rope,as well as the complex friction between the inter-wires,it is easy to degrade in service performance or even fail to scrap,which may lead to major engineering accidents.Therefore,in order to ensure the safety of production,it is particularly important to study the behavior of multi-layer structure wire rope under the influence of different factors,and to explore the evolution law of elasto-plasticity and friction and wear.Multi-layer structure wire rope as the research object in this paper,and analysed its mechanical properties under different load,and compared the mechanical properties with different twist way multilayer structure wire rope under tensile,torsion and bending load.The influence of different pit distribution on corroded multi-layer steel wire rope was studied,and the evolution law of friction and wear of multi-layer structure wire rope was explored.In order to provide reference for the selection and design of multi-layer structure wire rope.The following is the main content of this paper:(1)Comparative study on mechanical performances of multi-layer structure wire rope of different laying types.Considering the interaction between the internal wires of multi-layer structure wire rope,the elasto-plastic contact behavior model between wires was established and solved.The distribution of parameters of inter-wire elastic deformation,plastic deformation and elastic stress were obtained.The difference of mechanical properties of multi-layer structure wire rope with different twist types is studied through coupling solution of elasto-plastic contact characteristics and static properties between wires.The results show that the unidirectional rotation resistance of albert laying wire rope is stronger than that of alternate laying wire rope under tensile load.Under torsional load,the alternate laying wire rope shows better axial bearing capacity.Under the bending load,the maximum stress and strain of the two kinds of wire ropes occur in the core wire,which leads to the core wire is more prone to produce stress yield.the maximum stress and strain of the albert laying wire rope are larger than that of the alternate laying wire rope,and the plastic deformation is more likely to occur.(2)Influence of different pit distribution on mechanical properties of multi-layer structure wire rope.Considering the influence of the surface morphology of the corroded multi-layer structure wire rope,establishing the performance model for corroded multilayer steel wire rope to analyze the evolution of tensile properties,wire contact properties and stress-strain properties of rope under different corrosion pit distribution conditions,and to explore the influence of different corrosion pit distribution on mechanical properties of multi-layer structure wire rope.The results found that maximum stress and strain of corrosion multi-layer structure wire rope are occurred in the corrosion pits,it's value and the stress concentration factor of corrosion pit are increase firstly and then decreases with the increase of the direction angle of corrosion pit,and decrease with the increase of position angles of the corrosion pit and Axial inclination,and increase with the with the increase of the corrosion pit circumferential angle.The existence of corrosion pits will reduce the axial bearing capacity of the wire rope.(3)Study on evolution law of friction and wear of multi-layer structure wire rope.Based on the study of the contact characteristics of multi-layer structure wire rope,the friction and wear contact model between the outer side wire and the inner wire under bending load was established with considering the influence of Poisson's ratio effect,friction coefficient and contact deformation.On the basis of Archard modified model,UMESHMOTION subroutine was written in FORTRAN language and inserted into ABAQUS commercial software for secondary development.And combining with the ALE adaptive mesh technology which can update the mesh in the software to explore the evolution law of inter-wire wear of multi-layer structure wire rope.The results show that under bending load,the slip distance and angle of side wire of wire rope are different at different phase angles.The relative slip distance of 90 ° phase angle is the largest,and the minimum is at 0 ° phase angle.For the relative slip angle,the maximum occurs at 45 ° phase angle,and the minimum is at 90 ° phase angle.With the increase of wear times,the wear depth and width between wires increase gradually at different phase angles while the contact pressure between wires decreases gradually.Under the same wear times,the wear degree is the largest when the phase angle is 45 degrees.