Research on the Braided Corrugated Hose Subjected to Axial Tension Considering Friction Between Braid and Bellows

The numerical simulation of the braided corrugated hose is always researched without considering the metallic braided tube, making the results of the study not match the actual situation. To address the problem, the entire braided corrugated hose model is established, and the axial mechanical properties of braided corrugated hose are studied, while the effect of the metallic braided tube on the bellows is also considered. Main conclusions are as follows: the axial stiffness of the braided corrugated hose is non-linear, in the early stages, the deformation is mainly small displacements and the axial stiffness consists of metallic braided tube and bellows respectively, in the later stages, the axial stiffness consists mainly of the contact stiffness between braided tube and bellows. For the bellows, the maximum equivalent stress and strain occur in the area where contact with metallic braided tube, with a maximum stress of 1055MPa. The maximum contact pressure between the metallic braided tube and the bellows is 151.54MPa and the friction stress is 27.717MPa. It is found that the contact characteristic between the metallic braided tube and the bellows has a great influence on the axial mechanical properties of the braided corrugated hose by compared the relationship between the axial stiffness and contact pressure.