ねじの疲労強度に及ぼす締付力および被締結体の影響

概要

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In this report, at first the theoretical expression for the relation between the clamping force and the fatigue limit under the constant external mean load was developed on the prior condition of separation and no separation of clamped parts. Then the behavior of the bolted connection that the bolt is clamped in plastic region was investigated experimentally. Also the influence of the thickness of the clamped parts considering the force ratio was studied. The obtained results are as follows : (1) On the relation between the clamping force and the fatigue limit, the theoretical values almost corresponded with the experimental values. (2) As the thickness of the clamped parts increased, the force ratio decreased, but the difference of the fatigue limits on clamping in plastic region is negrigible because of the residual clamping force loss. (3) When the bolt is clamped in plastic region, the fatigue limit of the bolted connection was improved, and the variations of the clamping force, axial load amplitude and force ratio were hardly recognized.
公益社団法人精密工学会の論文
1984-07-05