表面磨损对钢丝绳裂纹萌生与扩展的影响  

Effect of surface wear on formation and propagation of cracks in wire rope

作　　者：秦智军 刘钰成 钱尼君 刘华龙 江五贵[2] Qin Zhijun;Liu Yucheng;Qian Nijun;Liu Hualong;Jiang Wugui

机构地区：[1]江西省特种设备检验检测研究院,南昌330096 [2]南昌航空大学航空制造工程学院,南昌330063

出　　处：《起重运输机械》2023年第24期41-46,共6页Hoisting and Conveying Machinery

基　　金：江西省检验检测认证总院科研项目(ZYK202205)。

摘　　要：结合扩展有限元法和M积分法,建立了1×19+IWS钢丝绳不同表面磨损的简化有限元模型,对其在轴向拉伸载荷下的裂纹萌生与扩展进行了仿真研究。分析了钢丝绳在拉伸载荷下整体与磨损区域的应力分布;随后基于扩展有限元法与M积分法,得到了不同径向与轴向磨损量下磨痕区域的应力强度因子。结果表明,随着径向磨损量增大,在磨损量5.5%之前,磨痕处的应力强度因子随磨损量线性增长,在超过5.5%磨损量之后,急剧增加,研究成果验证了GB/T 5972—2016《起重机钢丝绳保养、维护、检验和报废》中规定的钢丝绳报废标准。相比于径向磨损,钢丝绳的轴向磨损量对磨痕处应力强度因子的影响不大,并且越大的轴向磨损对裂纹扩展的抑制越强。Combined with the extended finite element method and the M-integral method,a simplified finite element model of different surface wear of 1×19+IWS wire rope was established to simulate the crack formation and propagation under axial tensile load.The stress distribution of the whole wire rope and the worn area under tensile load was analyzed.Then,based on the extended finite element method and the M-integral method,the stress intensity factors of the wear mark area under different radial and axial wear amounts were obtained.The results show that with the increase of radial wear,the stress intensity factor at the wear mark increases linearly with the wear amount before the wear amount reaches 5.5%,and increases sharply after exceeding 5.5%,which verifies the national standard for wire rope scrapping.Compared with radial wear,the axial wear of wire rope has little effect on the stress intensity factor at the wear mark,and the greater the axial wear,the stronger the inhibition effect on crack propagation.

关 键 词：钢丝绳 裂纹扩展 表面磨损 M积分法 扩展有限元 应力强度因子 

分 类 号：TD532[矿业工程—矿山机电]