A study of loosening and fatigue of bolted joints under transverse vibration

Shinji Hashimura, Darrell F. Socie

研究成果: Conference article査読

9 被引用数 (Scopus)

抄録

Bolt loosening fatigue tests under small transverse vibrations have been performed to understand the behavior in the long life region. The current study is focused on the loosening-fatigue mechanism and on the estimation of nominal stress at the root of the first thread caused by transverse vibration. Results show that if a bolt has loosened within 103∼104 vibration cycles, damage such as crack nucleation at the root of the first thread is not observed, and loosening is due to bolt rotation. However, if loosening does not occur until approximately 105∼106 cycles, then a crack is observed at the root of the first thread in the all experiments. Loosening occurs due to loss of bolt stiffness caused by crack nucleation and propagation which then leads to bolt rotation. Results also show that the initial clamping force above a threshold level does not significantly influence the loosening-fatigue life of a bolted joint. The amplitude of the transverse vibration force is the most significant influence on the loosening-fatigue life.

本文言語English
ジャーナルSAE Technical Papers
DOI
出版ステータスPublished - 2005 1月 1
外部発表はい
イベント2005 SAE World Congress - Detroit, MI, United States
継続期間: 2005 4月 112005 4月 14

ASJC Scopus subject areas

  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 汚染
  • 産業および生産工学

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