Finite Element Analysis of the Reinforced Multi-Layer S-Shaped Titanium Alloy Bellows Components’ Strength and Axial Stiffness Based on ADINA

In order to investigate the influence of different structural parameters on the mechanical properties of reinforced S-shaped titanium alloy bellows components, finite element analysis software ADINA was used to analyze and calculate the strength and axial stiffness of bellows with different geometric parameters such as inner diameters and wall thicknesses. Comparative analysis results such as Von-Mises stress, displacement, and axial stiffness under different working conditions can be obtained quantitatively. The results indicate that the maximum stress of the bellows component is located at the inner trough of the wave, and the maximum stress decreases with the increase of wall thickness, and the decrease of inner diameter. Axial stiffness increases with the increasement of wall thickness and inner diameter. Compared with the inner diameter, wall thickness has a more obvious effect on axial stiffness enhancement. Due to TA2 titanium alloy strip shows relatively low plasticity, conventional forming method such as hydroforming process cannot accurately form the multi-layer bellows components with large diameter. In engineering application area, comprehensive factors such as the technical maturity of forming process solutions, lightweight requirements of components, research and development of auxiliary process equipment, and manufacturing costs must be considered. The findings of this study provide some valuable guidance for optimizing the structure of S-shaped bellows components and improving their strength and stability.