Conclusion
Calculation of screw assemblies

In this first part, we presented the methods for dimensioning joints working in matage-shear, under static loading at failure. For joints with several rows of bolts, these calculations remain simple and effective, since at failure, the plates are plastically deformed around all the holes and all the fasteners transmit the same maximum force, which corresponds to the force at failure of a single fastener.

Paradoxically, the behavior of friction-locked joints is more difficult to assess. While the calculation is the same at fracture, the overall stiffness of the joint before sliding is much greater, reflecting the very high stiffness of each individual fastener resulting from the transfer of force by bonding. However, no calculation method is available to assess the "flexibility" of these fasteners, and calculating the distribution of forces between the different...