Research on Strengthening of Ends of Stainless Steel Pipe Fittings

The establishment of the three-dimensional finite element model of stainless steel pipe fittings. Through stress analysis, it is found that there is obvious stress concentration on the compressed end face of the wound pipe under the condition of axial compression. It is predicted that the edge effect of the compressed end face of the pipe fitting will lead to the decrease of the axial compressive strength of the pipe fitting through the three-dimensional finite element model. Quantitative calculations were carried out on the axial compressive strength of end-reinforced and unreinforced pipe fittings, and it was concluded that the axial compressive strength of end-reinforced pipe fittings was significantly higher than that of unreinforced pipe fittings. Space carrier thrust bracket refers to the main force-bearing structure on the carrier that transmits the large thrust generated by the engine from one structure to another. It is generally composed of stainless steel pipe fittings, stainless steel joints, end frames and end plates. Stainless steel pipe fittings are the main load-bearing components of the thrust bracket. They are usually made of metal materials and have a relatively large mass. The research results show that the end reinforcement of stainless steel pipe fittings can effectively reduce the negative impact of the end effect on the axial compressive strength, and the axial compressive strength can be increased by more than 30%.