Non-standard composite material bolt and design method thereof
By constructing a parametric model and using finite element software to optimize the geometric parameters and material combinations of the bolt-nut connection structure, the problem of insufficient load-bearing capacity of composite bolts was solved, achieving efficient optimization of thread stress area and design of load-bearing failure modes, thus improving the overall performance of composite fasteners.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING INST OF TECH
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
When existing metal bolt design methods are directly transferred to composite material systems, the load-bearing capacity of composite bolts is insufficient, and they cannot effectively guide the optimization of thread stress area, geometric structure adjustment, and load failure mode design.
A parametric model of the bolt-nut connection structure was constructed, and multi-condition mechanical simulation was performed using finite element software to verify the preset performance analysis criteria. Through the collaborative iteration of optimization algorithms and finite element software, the optimal combination of geometric parameters and materials of the bolt was determined, and geometric morphology parameters such as thread height, thread width, nut thickness, and head fillet were optimized to increase the load-bearing cross-sectional area and improve load transfer efficiency.
It significantly improves the tensile strength and fatigue life of composite fastener threads, reduces the risk of thread detachment, and enhances the reliability and load-bearing capacity of the connection.
Smart Images
Figure CN122413612A_ABST