抄録
We developed a novel technique for bolt tightening control by utilizing SrAl2O4:Eu (SAOE) paint film to detect axial force generated during bolt tightening. The prevalently used bolt tightening control method is torque control, which indirectly controls the axial force in the bolted joint, but only a small proportion of the torque actually contributes to the bolt extension that generates the axial force to fasten bolt. Therefore, it is urgently necessary to directly measure the axial force in order to realize a smart tightening control. In the present work, we also demonstrated the correlation between the elastico-luminescence intensity and tightening conditions including tightening speed and strain as well as axial force.
