基于ANSYS不同螺旋槽规格的钢丝应力分析

The Stress Analysis of Different Spiral Groove Steel Wire Based on ANSYS

目的研究在钢绞线中心丝上设置螺旋式凹槽并植入光纤光栅的智能钢绞线,解决对大应力应变钢绞线损伤破坏全过程的实时监测问题.方法螺旋槽的角度对光纤光栅传感器的应变灵敏度起着关键性作用,同时螺旋槽宽和槽深影响了钢绞线的应力情况,基于ANSYS有限元软件,通过改变不同螺旋槽角度、宽度和深度,对螺旋槽中心丝的最大应力、最大位移和螺旋槽内应力变化率方面进行分析.结果不同螺旋槽规格对智能钢绞线的力学性能及应变监测量程有着重要的影响,当螺旋槽钢丝槽深0.3 mm,槽宽1.2 mm,角度为45°时,该螺旋槽钢丝的最大应力和最大位移适中,螺旋槽内应力变化率为57.1%,应力集中情况较小,对钢绞线承载力影响较小.结论该ANSYS分析为螺旋槽中心丝对智能钢绞线力学性能及大量程应变监测性能提供有效的依据.

In order to realize the real-time monitoring of the damage and failure process of large stress and strain steel strand, the composite technology that the spiral groove steel wire is proposed to replace the steel center wire and the fiber Bragg grating sensor stick into the spiral groove, is put forward. The angle of spiral groove plays a key role in the strain sensitivity of fiber Bragg grating sensors, at the same time, the stress condition of the steel strand is influenced by the width and depth of the spiral groove, therefore, different spiral groove specifications have an important influence on the mechanical properties and strain monitoring range of smart steel wire ,When the spiral steel wire groove depth 0. 3 mm, width 1.2 mm, angle of 45 degrees, the maximum stress and maximum displacement of spiral groove steel wire is moderate, and the stress change rate of internal spiral groove is 57.1% ;Moreover, the fact that the stress concentration is small has little effect on the bearing capacity of steel strand. Based on ANSYS finite element software, spiral groove center wire of the maximum stress value, maximum displacement, variation rate of spiral groove stress and other aspects will be analyzed under changing different spiral groove angle, width and depth, which provide the effective basis for the mechanical properties of the intelligent steel wire and the large range strain monitoring performance with the center wire of the spiral groove.