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Effect of Key Variable Combinations on the Vibration-Induced Loosening of Preloaded Fasteners

[+] Author Affiliations
Joon Ha Lee

Hyundai Motor Company, Hwaseong-si, South Korea

Khalid Mahmood, Sayed A. Nassar

Oakland University, Rochester, MI

Paper No. IMECE2016-67359, pp. V002T02A083; 8 pages
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 2: Advanced Manufacturing
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5052-7
  • Copyright © 2016 by ASME


This study investigates the effect of key variable combinations on the loosening performance of a preloaded threaded fastener system under harmonic transverse vibrations, using a software for bolt loosening analysis. The software is based on a mathematical model of the standard Junker test for vibration loosening. Studied variable combinations include the fastener initial tension, thread pitch, bearing and thread friction coefficients, bolt stiffness, and joint stiffness. Generated data on bolt loosening performance is analyzed for trends and relative significance of variables, and variable combinations.

Copyright © 2016 by ASME
Topics: Fasteners , Vibration



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