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Evaluations of the Tightening Process of Bolted Joint With Elastic Angle Control Method

[+] Author Affiliations
Toshimichi Fukuoka, Tomohiro Takaki

Kobe University, Kobe, Japan

Paper No. PVP2004-2617, pp. 11-18; 8 pages
  • ASME/JSME 2004 Pressure Vessels and Piping Conference
  • Analysis of Bolted Joints
  • San Diego, California, USA, July 25–29, 2004
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4673-3
  • Copyright © 2004 by ASME


Various clamping methods are used to tighten bolted joints and the selection is made according to its configuration, bolt size, etc. Angle control method is commonly used among them and it is usually applied when tightening bolts to the plastic region. However, elastic angle control method is sometimes used to tighten important structures, e.g., for the case where the clamping bolts are to be disassembled in a periodical inspection. In this paper, the tightening process of elastic angle control method is studied and the expression relating axial bolt force and nut rotation angle is proposed, in which the effects of surface roughness of contact surfaces and the inclined angle existing around nut loaded surface are incorporated. The validity of the proposed equation is demonstrated by experiment. It is shown that the elastic angle control method is preferably applied to the case of a bolted joint with large grip length being tightened with high bolt stress.

Copyright © 2004 by ASME



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