ねじの締付けによるボルト軸の曲げモーメントに関する研究

概要

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The bending acts on the bolt further with tension and torsion by tightening of the threaded fasteners. The bending moments of the bolt shank caused by the asymmetric shape of the screw threads and the tightening on the inclined bearing surface are examined analytically and experimentally. The value of bending stress within the bolt which produces by the asymmetric shape of the screw threads is very small. However, the maximum value of the bending moment of the bolt shank caused by the tightening on the inclined bearing surface increases proportionally to the angle of inclination. The value of that bending moment is large. The validity of the analyzed result is confirmed by some experiments. Furthermore, it is revealed that the bending moment of the bolt shank influences the torque coefficient for tightening of the threaded fasteners.
2006-10-05