中国机械工程 ›› 2023, Vol. 34 ›› Issue (16): 1891-1899.DOI: 10.3969/j.issn.1004-132X.2023.16.001

• 机械基础工程 • 上一篇    下一篇

滚动轴承接触疲劳裂纹建模与扩展规律研究

郭伟1,2;曹宏瑞1;訾艳阳1;尉询楷3   

  1. 1.西安交通大学机械制造系统工程国家重点实验室,西安,710049
    2.中煤科工西安研究院(集团)有限公司,西安,710077
    3.北京航空工程技术研究中心,北京,100076
  • 出版日期:2023-08-25 发布日期:2023-09-12
  • 通讯作者: 曹宏瑞(通信作者),1982年生,教授、博士研究生导师。研究方向为数字孪生驱动的健康管理与智能运维新模式。E-mail:chr@mail.xjtu.edu.cn。
  • 作者简介:郭伟 ,女,1984年生,助理研究员、博士。研究方向为损伤机理分析、钻探装备研发。E-mail:117330939@qq.com。
  • 基金资助:
    国家科技重大专项(J2019-Ⅳ-0004-0071)

Study on Contact Fatigue Crack Modeling and Propagation Law of Rolling Bearings

GUO Wei1,2;CAO Hongrui1;ZI Yanyang1;WEI Xunkai3   

  1. 1.State Key Laboratory for Manufacturing Systems Engineering,Xian Jiaotong University,
    Xian,710049
    2.Xian Research Institute of China Coal Technology and Engineering Group Corp,Xian,710077
    3.Beijing Aeronautical Engineering Technical Research Center,Beijing,100076
  • Online:2023-08-25 Published:2023-09-12

摘要: 针对滚动轴承的疲劳剥落损伤演化问题,采用扩展有限元方法研究疲劳裂纹扩展机理,通过算例验证了扩展有限元方法的可靠性。运用断裂力学理论建立了包含次表面初始裂纹的滚动接触疲劳扩展有限元模型,分析了初始裂纹倾斜角度、所处深度和初始裂纹长度对次表面裂纹生长到表面的扩展路径影响机制,通过分析应力强度因子变化研究了裂纹扩展机理。研究结果表明,次表面疲劳裂纹以滑开型裂纹扩展模式为主;初始裂纹角度对疲劳裂纹扩展路径影响较大,初始裂纹角度在15°~45°时裂纹会转向表面发展而形成疲劳剥落;初始裂纹尺寸和深度对裂纹扩展路径形貌的影响较小,但会影响裂纹扩展的难易程度。

关键词: 扩展有限元方法, 裂纹扩展, 滚动接触疲劳, 机理

Abstract: Aiming at the damage evolution problems of rolling bearings, fatigue crack propagation mechanism was studied via XFEM. The reliability of the XFEM was verified by an example. An XFEM model of rolling contact fatigue with subsurface initial crack was proposed through fracture mechanics theory. The influencing mechanism of initial crack angle, depth and length on the propagation life and growth path of cracks in subsurfaces were analysed. Crack propagation mechanism was studied through analyzed the variation of stress intensity factors. Results show that sliding mode is the main growth mode of initial cracks in subsurface. The crack angle has a great influence on the fatigue crack growth path. The initial cracks with angle in the 15~45 degree range are easy to change the grow direction to surface which lead to fatigue spall. The crack size and depth have little effects on the morphology of the crack propagation path, but will affect the difficulty of crack propagation.

Key words: extended finite element method(XFEM), crack propagation, rolling contact fatigue, mechanism

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