Residual Torsional Deformation and Residual Torque Due to Screw Fastening

Kazuo Hayashi, Yuh Kagami, Hiroyuki Abe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In the design of precision instruments containing a screw fastening, it is necessary to estimate residualtorsional deformation remaining in the fastened body after fastening by bolts. Here, based on the three-dimensional theory of elasticity, torsional deformation is analyzedI for cylindrical fastened bodies. It is revealed that the residual torsional deformation does not spread throughout the whole fastened body but it is restricted in the vicinity of the bolt hole. A new formula is established for estimating residual torque in a bolt due to screw fastening, by considering the gap betwe n S torsional angle released in a bolt after fastening and that in a fastened body. The formula is examined experimentally to give a much better estimation than those suggested so far Finally a method of estimating the residual torsional deformation is proposed for designing precision instrument.

Original languageEnglish
Pages (from-to)1096-1101
Number of pages6
Journaltransactions of the japan society of mechanical engineers series c
Issue number489
Publication statusPublished - 1987 Jan 1


  • Elasticity
  • Fastened Body
  • Fixing Element
  • Residual Torque xorbionai
  • Residual Torsional Deformation
  • Screw Fastening

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


Dive into the research topics of 'Residual Torsional Deformation and Residual Torque Due to Screw Fastening'. Together they form a unique fingerprint.

Cite this