• CN:11-2187/TH
  • ISSN:0577-6686

›› 2010, Vol. 46 ›› Issue (16): 53-59.

• 论文 • 上一篇    下一篇

过盈配合微动损伤的关键参数

杨广雪;谢基龙;李强;石长伟   

  1. 北京交通大学轨道车辆结构可靠性与运用检测技术教育部工程研究中心;北京强度环境研究所
  • 发布日期:2010-08-20

Key Parameters of Fretting Damage under Shrink Fit

YANG Guangxue;XIE Jilong;LI Qiang;SHI Changwei   

  1. Engineering Research Center of Structure Reliability and Operation Measurement Technology of Rail Guided Vehicles of Ministry of Education, Beijing Jiaotong University Beijing Institute of Structure and Environment Engineering
  • Published:2010-08-20

摘要: 微动损伤广泛存在于各类工程机械和结构之中,接触压力、滑移幅值以及摩擦剪切力是微动损伤的重要参数。过盈连接部件在旋转弯曲载荷下,易于在接触区域产生微动损伤,降低构件的使用寿命。以过盈微动疲劳试验中的试样为研究对象,在有限元软件ABAQUS中建立接触模型,充分考虑高应力梯度区和接触对网格划分的要求,同时在远离接触区域划分粗糙网格,减少计算机时。通过分布加载和改变相关参数的方法,分析套管长度、套管厚度、摩擦因数以及过盈量对接触压力、摩擦剪切力等影响规律。结果表明,轴套过盈配合承受弯曲载荷下,接触压力和摩擦剪切力沿轴向分布不均匀,随着各参数的变化而明显变化,摩擦因数、套管厚度和套管长度对接触边缘的应力奇异性有较大影响,摩擦因数显著地影响了滑移区域的大小。

关键词: 过盈配合, 接触压力, 摩擦剪切力, 微动损伤

Abstract: Fretting damage is widely present in various engineering machinery and mechanical structures, and contact pressure, slip amplitude and frictional shear traction are most important parameters of fretting damage. The shrink-fit components usually suffer fretting damage in the contact surface under rotating bending load, which remarkably reduce the life of the components. Aiming at the specimen under shrink-fit fretting fatigue test, a finite element model of the specimen is established in the code ABAQUS, including contact algorithm. The influences of casing length, casing thickness, frictional coefficient and interference value on contact pressure, frictional shear traction are analyzed. The results show that frictional coefficient, casing thickness and casing length have significant effect on the stress singularity of the contact edge, and frictional coefficient also effect the slip regime greatly.

Key words: Contact pressure, Fretting damage, Frictional shear traction, Shrink fit

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