Effect of threaded connection tolerances to prestressed bolted

Zsolt Bider

Combination of extreme values of components within the tolerance zone or the presence of detergent and oil can lead to insufficient prestressing force.  The risk of co-occurrence of these effects is 0.015%. The main goal of this research is to establish generalizable relationship which takes these factors into account.  The subfields of the research are:  stress–strength analysis of screws; geometrical size determination of nut and bolt pairs; establishing relationship between tightening torque and screw force taking lubrication conditions, profile errors and geometrical sizes into account; finite element analysis to determine the occurring stress and deformation of the joint.