Research on Self-Loosening Behavior of Bolted Joints under Eccentric Excitation

被引：9
|
作者：
Du Y. [1 ]
Liu J. [1 ]
Liu X. [1 ]
Cai Z. [1 ]
Peng J. [1 ]
Zhu M. [1 ]
机构：
[1] Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2018年 / 54卷 / 14期
关键词：
Bolted joints; Eccentric excitation; Fretting wear; Self-loosening mechanism;
D O I：
10.3901/JME.2018.14.074
中图分类号：
学科分类号：
摘要：
Based on a new bolt loosening test rig, the loosening tests of bolted joints subjected to eccentric excitation are carried out under various experimental parameters. According to the evolution curves of the axial force of the bolt, the self-loosening behavior of bolted joints under eccentric excitation is investigated. After the tests, the damage of threads is analyzed using OM (optical microscope), SEM (scanning electron microscope) and EDX (energy dispersive X-ray). The influences of fretting behavior (micro-slip and fretting wear) between the contact threads on self-loosening of bolted joints are discussed in depth, and the self-loosening mechanism of bolted joints is revealed in details. The results show that the axial force of the bolt decreased obviously, while the breakaway torque has no obvious change. The self-loosening process of a bolted joint can be divided into two stages: Firstly, the axial force of the bolt drops rapidly due to the removal of asperities on the contact surfaces and the plastic deformation. Secondly, because of the ratcheting of material, plastic deformation increases slowly, and fretting wear between contact surfaces is the main reason of the decrease of the axial force of the bolt. The main wear mechanisms of the contact surfaces between threads were delamination, abrasive wear and adhesive wear. In addition, numerical simulation was performed using ABAQUS, and the FE results are agreement with the experimental observations. © 2018 Journal of Mechanical Engineering.
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页码：74 / 81
页数：7
相关论文
共 22 条
  • [1] Hou S., Liao R., Resaerch progress on self-loosening of threaded fasteners, Structure & Environment Engineering, 41, 2, pp. 39-52, (2014)
  • [2] Zhang C., You X., Lu H., Et al., Numerical simulation of bolt failure in rocket inter - stage connection, Structure & Environment Engineering, 34, 4, pp. 49-57, (2007)
  • [3] Gambrell S.C., Why bolts loosen, Machine Design, 40, pp. 163-167, (1968)
  • [4] Nassar S.A., Matin P.H., Clamp load loss due to fastener elongation beyond its elastic limit, Journal of Pressure Vessel Technology, 128, 3, pp. 379-387, (2006)
  • [5] Nassar S.A., Matin P.H., Cumulative clamp load due to a fully reversed cyclic service load acting on an initially yielded bolted joint system, Journal of Mechanical Design, 129, 4, pp. 421-433, (2007)
  • [6] Basava S., Hess D.P., Bolted joint clamping force variation due to axial vibration, Journal of Sound and Vibration, 210, 2, pp. 255-265, (1998)
  • [7] Xie H., Wang F., Zhang K., Et al., Bolt looseness and the causes analysis in the vibration, Modern Machinery, 3, pp. 44-47, (2017)
  • [8] Junker G.H., New criteria for self-loosening faster under vibration, SAE Transactions, 78, pp. 314-335, (1969)
  • [9] He J., Tang T., Wang C., Finite element research on self-loosening problem of bolt connection under the alternating lateral load, Modern Manufacturing Engineering, 3, pp. 1-6, (2016)
  • [10] He J., Wang C., Tang T., Study on slip of the screw thread subjected to axial eccentric alternate load, Mechanical Science and Technology for Aerospace Engineering, 34, 8, pp. 498-503, (2015)
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