Strength design of stainless steel pipe fittings

Stainless steel pipe fittings are the main load-bearing components on the bracket. Research on the structural design and optimization of stainless steel pipe fittings, the preparation technology of stainless steel pipe fittings, the theoretical design and experimental analysis of axial compression performance, etc. are carried out. Strength design has always been the difficulty and hot spot in the structural design of stainless steel pipe fittings. Whether it is angle-layered stainless steel pipe fittings or axial/circular orthogonal layered pipe fittings, a proper amount of hoop layer can significantly improve the axial compressive strength of the pipe fittings. After changing the 20% angle layer (axial layer) to the ring layer, the axial compressive strength of the stainless steel pipe with a winding angle of 20 has been doubled, and the axial compressive strength of the orthogonally layered stainless steel pipe has also been improved. By more than 10%. The finite element model is used to analyze the bearing performance of composite thrust brackets on the X-33 and Atlas V launch vehicles. It is pointed out that the comprehensive bearing capacity of the structure of the X-33 thrust bracket is better. Good, suitable for more complex load conditions, while the Atlas V thrust bracket structure has a better compression bearing capacity and is suitable for load conditions dominated by large thrust.