Abstract
The purpose of this report is to discuss the behaviour of bolted joints tightened in plastic region. Although, there have been many reports about plastic region tightening method, their discussion were made on the classical criterion based on the rigid-plastic solution for combined loads of axial tension and torsion. Moreover, in the old analyses, very ideal models of cylinder have been used assuming the uniformly distributed axial tension and a state of pure shear. In this study, the finite element method is applied to the elasto-plastic analysis of bolted joints. Tap bolt tightening and Bolt-nut tightening are compared.
