Abstract: In this paper, the factors influencing the tightening of studs are analyzed from the aspects of design required preload, actual required preload, actual tightening force and upper limit of design preload. In addition, some suggestions are put forward from the upper limit of design preload, i.e., the strain strengthening treatment of austenitic stainless steel stud is an effective measure to improve the stud strength. A simplified algorithm is provided for setting the initial load of studs.

Key words:  , stud, preload, strain strengthening, simplified algorithm