宇航材料工艺2025，Vol.55Issue(4)：111-118,8.DOI:10.12044/j.issn.1007-2330.2025.04.017
拧紧工况对螺栓连接预紧力的影响规律研究
The Study on Influence Law of Tightening Condition on the Pretightening Force of Bolted Connection
杜坤鹏 1王天立 1史建猛 1邱建平 1齐振超2
作者信息
- 1. 中航西安飞机工业集团股份有限公司,西安 710089
- 2. 南京航空航天大学机电学院,南京 210016
- 折叠
摘要
Abstract
Addressing issues such as inconsistent preload and short-term relaxation in bolted connections,this study focused on composite bolted connection structures.Based on the formation mechanism of preload in conventional bolts,the principles of preload generation in high-lock bolts was analyzed,deriving the torque-preload relationship for high-lock bolts.Through bolt tightening tests,the study determined key parameters such as locking torque,breakaway torque,and fitted the torque-preload relationship curve for high-lock bolts.Single-factor experiments were designed to analyze the effects of tightening speed,lubrication conditions,and tightening steps on the consistency of bolt connection preload.The tests show that tightening speed and lubrication conditions have a significant impact on the consistency of bolt preload force.Higher tightening speeds and the application of lubrication can achieve greater preload force,but the consistency of preload force deteriorates.To address the issue of short-term preload decay after bolt tightening,a 48 h natural relaxation test was designed to investigate the natural relaxation patterns of bolt preload in composite laminated structures under various conditions such as tightening speed,lubrication conditions,and tightening steps.The results indicat that lubrication conditions have the most significant impact on the natural relaxation of bolt preload in composite laminated structures.关键词
复合材料/预紧力/自然松弛/拧紧速度/润滑条件/拧紧步数Key words
Composite/Preload force/Natural relaxation/Tightening speed/Lubrication conditions/Tightening steps分类
通用工业技术引用本文复制引用
杜坤鹏,王天立,史建猛,邱建平,齐振超..拧紧工况对螺栓连接预紧力的影响规律研究[J].宇航材料工艺,2025,55(4):111-118,8.
