Proposal of Methodology for Verification of Stress Distribution in Bolted Joints by Optical Method

Nowadays, the most spread method for the solution of contact problems is based on numerical modelling. The bolted joints belong to the complex contact problems. In the paper is given methodology for the stress analysis of bolted joints with modification in the area of the first threads on the nut by the optical method. The stress analysis has been accomplished for the bolted joint without as well as with modification. The results of experimental measurements were verified by numerical modelling by the finite element method.