Prediction of bearing capacity of composite laminated square tube bolt connector based on progressive damage analysis

The ultimate bearing capacity of composite laminated square tube bolt connector was studied in both experimental and simulating approaches. A three-dimensional progressive damage finite element model simulating the failure process and mode of composite laminated square tube bolt connector was established in ABAQUS/Explicit. The error of ultimate load obtained from experiment and finite element calculation was less than 5%, and the joint underwent non-catastrophic local extrusion failure under tensile load. The influence of the angle of laying layer on the ultimate bearing capacity was analyzed using the validated numerical model.