An Axi-Asymmetrical Analysis of Circular Flange Connections Subjected to External Bending Moments

  • Toshiyuki Sawa
  • Tsuneshi Morohoshi
  • Akihiro Shimizu
  • Kyouichi Yamamoto


In designing bolted joints,it is important to examine the clamping effect (the distribution of contact stress) and to estimate the load factor (the ratio of an increment of bolt axial force to an external load). The clamping force of bolts and an external bending moment are both axi-asymmetrical loads, and no investigations regarding as axi-asymmetrical loads have been performed. In this paper, the clamping effect and the load factor in the case where clamped parts are circular flanges subjected to external bending moments are analyzed as axi-asymmetrical problems using a three-dimensional theory of elasticity. Experiments are carried out concerning the distribution of contact stress and the load factor for the external bending moment(the relationship between an increment/decrement of bolt axial force to an external bending moment). The analytical results are satisfactorily consistent with the experimental ones.


Load Factor Contact Stress Bearing Surface Isochromatic Fringe Bolt Hole 
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Copyright information

© Elsevier Science Publishers Ltd 1990

Authors and Affiliations

  • Toshiyuki Sawa
    • 1
  • Tsuneshi Morohoshi
    • 2
  • Akihiro Shimizu
    • 3
  • Kyouichi Yamamoto
    • 4
  1. 1.Department of Mechanical EngineeringYamanashi UniversityKofu,YamanashiJapan
  2. 2.ASK Co.LtdJapan
  3. 3.Epson-Seiko Co.LtdJapan
  4. 4.Mitsubishi Electric Co.LtdJapan

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