Abstract：Bolt connections are widely used in the mechanical industry. For the performance of low clearance Ti–6Al–4V ELI hexagonal head bolts in service in the connection structure, a 3D finite element model of single-lap bolted connection structure considering thread details was established based on ABAQUS finite element simulation software. The Ti–Ti and Ti–Al bolting models were established to simulate the two analysis processes of preload and tension of the bolt connection structure. The Ti–6Al–4V ELI material parameters were verified by comparison of tensile tests and finite element simulation result. The loading curve of the bolt preload force, the load capacity curve of the bolt connection structure and the stress distribution state of the bolt connection structure during preload and tension were obtained by finite element simulation, and the influence of the bolt preload force on the mechanical properties of the bolt connection structure was investigated.
2022, 
