To explore the mechanical performance of aluminum alloy hub joints in spatial structure system

nonlinear finite element software ABAQUS is used to establish refined numerical models for 25 aluminum alloy hub joints with different sizes to study the tensile and compressive properties. The effects of hub body groove spacing

tooth spacing

tooth width

tooth depth

and other factors on the mechanical performance of the nodes are studied. Results show that the tensile bearing capacity of the joint is mainly borne by the concave and convex grooves between the hub body and the embedded part of the rod. When the parameters are changed

there are four failure modes in the tensile limit state: hub body convex tooth flexural shear failure

hub body innermost groove flexural shear failure

hub body outermost groove flexural shear failure

and hub body convex tooth shear failure. Within the range of study

if the hub body groove spacing and tooth width are increased

the tensile ultimate bearing capacity of the nodes increase by 71.3% and 112.9% respectively. The stress of joints is mainly caused by instability

and the change of parameters have little effect on the pressure of joints. Finally

the formula of ultimate bearing capacity and the design suggestion are given.