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Nonlinear behavior of disk spring with complex contact state.

Renzhen Chen1,2, Xiaopeng Li1,2, Zemin Yang1

  • 1School of Mechanical Engineering and Automation, 1848Northeastern University, PR China.

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|October 27, 2021
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Summary
This summary is machine-generated.

This study introduces a new model for disk springs, incorporating friction and contact stiffness. The findings reveal how these factors influence nonlinear behavior and system dynamics, leading to multiple resonance peaks.

Keywords:
Quasi-zero stiffnesscontact stiffnessenergy methodnonlinear behaviorvibration isolation

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Tribology

Background:

  • Disk springs are crucial for preload and isolation applications.
  • Previous models overlooked nonlinear contact stiffness, impacting accuracy.
  • Understanding friction and contact stiffness is vital for disk spring performance.

Purpose of the Study:

  • To develop a nonlinear model for disk springs that includes friction and contact stiffness.
  • To analyze the impact of asymmetric friction dissipation and fractal contact theory.
  • To investigate the load-deflection relationship, stiffness, and hysteresis.

Main Methods:

  • Deriving asymmetric displacements and dynamic friction models.
  • Applying fractal contact theory to determine contact stiffness.
  • Utilizing the energy method to establish nonlinear static and dynamic models.

Main Results:

  • The developed model accurately evaluates disk spring static properties.
  • Friction intensifies nonlinear system behavior, while contact stiffness mitigates it.
  • Nonlinear contact factors cause multiple resonance peaks in transmissibility curves.

Conclusions:

  • The integrated model provides a more comprehensive understanding of disk spring behavior.
  • Friction and contact stiffness are critical nonlinear factors influencing performance.
  • The study highlights the importance of considering these factors for predicting system dynamics and avoiding resonance issues.