Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (12): 1743-1747.DOI: 10.12068/j.issn.1005-3026.2018.12.014

• Mechanical Engineering • Previous Articles     Next Articles

Static Hysteresis Behavior Analysis and Stiffness and Damping Identification of Bolted Joints

SUN Wei1,2, TAN Long-fei1,2, WU Ning-xiang1,2   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. Key Laboratory of Vibration and Control of Aero-Propulsion Systems, Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Received:2017-09-19 Revised:2017-09-19 Online:2018-12-15 Published:2018-12-19
  • Contact: SUN Wei
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Abstract: Obtaining the static hysteresis behavior of bolted joints and identifying their stiffness and damping are of great significance for the design of bolt joints and the formulation of the assembly process. A three-dimensional finite element model is used to predict the hysteresis characteristics of bolted joints, and the setting method of the bolt contact parameters is given. Finally, a simple example of the bolted lap beam is chosen to present the developed method. The rationality of the finite element model of the bolted lap beam and the obtained hysteresis loop are validated by experiments. The time-varying stiffness, mean stiffness and loss factor of the bolted joint are identified by the obtained hysteresis loop. The results show that the stiffness of the bolted joint increases and the loss factor(damping parameter)decreases with the increase of the preload force.

Key words: bolted joint, static hysteresis behavior, stiffness, damping, identification

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