Experimental and numerical studies of the stress concentration factor for tubular KK-joints under axial loads

This paper reports on experimental test and numerical simulation methods that investigate the stress concentration factor and node deformation performance parameters for tubular KK-joints. The numerical analysis can give reference for design schemes of model test, and the bearing characteristics are studied by the model test. Moreover, by comparing the experimental analysis and the finite element simulation results, we discuss the accuracy of numerical analysis method in analyzing the tubular joints stress concentration factor. These can provide a useful reference for the engineering design.