Fastening connection technology is in the given service conditions and the conditions of the connection structure, with multiple fastening connection sub (fasteners, connected parts, connection technology, connection equipment) as the object of study, through the analysis of its overall structure and dynamics, the study of fastening connection system design selection, manufacturing, installation, operation and maintenance of service and other technologies, in order to meet the fastening connection system of the expected connection function, and to achieve the global performance of the system.

Fastening connection structures are widely used in various industries and have a broad market. The total weight of fasteners used in a modern aircraft can account for 5% -6% of the total weight of the aircraft. 

The failure of fastening connection structure has been the culprit of some catastrophic accidents. The reliability of fastening connection is very important. The direct economic losses caused by fastener loosening and fatigue fracture in countries all over the world amount to more than billions of dollars every year. However, there is still a serious lack of knowledge of fasteners in modern industry.

The value of research on fastening technology does not lie in the value of the fasteners themselves, but in the major equipment losses, major economic losses, social and political problems caused by fastener failure. In view of the various accidents and disasters caused by the failure of fastening connection structures, we need to ask the following questions:

1. Is the fastener product itself qualified?

2. Is the product qualified and the structural design reliable?

3. Is the product qualified, the design reliable, and the assembly process reasonable?

4. is the product qualified, the design is reliable, the assembly is reasonable, and the operation and maintenance process is reliable?

In the final analysis, the pain point of the fastening connection industry is the lack of fastening connection methodology to match with the high-end industry, the system reliability is difficult to control, and the equipment is a potential safety hazard.