Numerical study of the axial mechanical properties of braided corrugated hose with different braiding angles

The braided corrugated hose is widely used in aerospace, marine, chemical and other fields due to its good displacement compensation and vibration damping. This paper uses finite element method to explore the effect of braiding angle on the axial mechanical properties of the braided corrugated hose. The numerical results show that the axial stiffness of the braided corrugated hose is nonlinear, which can be explained in three stages. The first stage is a linear stage, and the stiffness of the bellows plays a major role. The second stage is the non-linear stage called the ‘soft characteristic’ stage and the third stage is the linear stage. The braiding angle mainly affects the ‘the soft characteristic’ stage. As the braiding angle increases, the faster the ‘soft characteristic’ changes, the greater the axial stiffness of the braided corrugated hose increases. The conclusion can provide a theoretical basis for the design of braided corrugated hoses.