Adhesive bonding
Calculation of screw assemblies

This type of assembly, shown in figure 10, is achieved by installing a controlled prestress in the bolts which, by compressing the elements to be assembled, creates frictional forces that oppose the relative sliding of the surfaces in contact, when the assembly is subjected to an external force F_T perpendicular to the bolt axis.

Overall, the operation is very simple. If we note Q the tightening force of a bolt (prestressing), F_T the force to be transmitted and f_p the coefficient of friction between the parts :

• 1. As long as F_T < f_pQ (single overlap) or F_T < 2 f_pQ (double overlap), i.e. as long as...