• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2018, Vol. 54 ›› Issue (15): 125-131.doi: 10.3901/JME.2018.15.125

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Investigation on the Energy Dissipation Properties of Jointed Structure during Macro-slip Stage

LI Yikun1,2, HAO Zhiming2   

  1. 1. Advanced Research Institute, Chengdu University, Chengdu 610106;
    2. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900
  • Received:2017-08-11 Revised:2018-03-11 Online:2018-08-05 Published:2018-08-05

Abstract: Iwan Model is often deployed to describe energy dissipations and damping properties of jointed structures. The analytical expression of energy dissipation vs. applied force during macro-slip stage is derived based on the six-parameter Iwan model. Parameter identification method according to the macro-slip experiment of bolted joints is also provided in order to deduce the parameters of the model. A finite amount of Jenkins elements is obtained and further applied in numerical simulations. The results indicate a good agreement between the analytical results of the six-parameter Iwan model and the experimental data. A linear relationship of energy dissipation vs. applied force is obtained due to the residual stiffness acting on the contact interfaces during the macro-slip stage. The calculated results show a good conformity with the analytical ones during the macro-slip stage. It is shown that the six-parameter Iwan model can be used to well describe the energy dissipation properties of bolted joints during the macro-slip stage.

Key words: contact friction, energy dissipation, Iwan model, jointed structure, macro-slip

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