Nonlinear dynamic analysis of PEEK based polymer composite involute spline couplings with textured tooth

To improve the wear resistance of involute spline couplings and meet the requirements of lightweight design, this work focuses on PEEK (polyetheretherketone) based polymer composite involute spline couplings with tooth surface texture. A dynamic model and differential equation of PEEK based polymer composite involute spline couplings with tooth surface texture were established using the concentrated mass method. The arrangement of tooth surface texture was established based on fractal theory, and a calculation method for the dynamic meshing stiffness of the system was established using the potential energy method. The surface texture morphology parameters, texture arrangement, and material characteristics were considered in this method. The dynamic characteristics of different textured systems were analyzed, and the influence of geometric eccentricity and rotational speed on the dynamic characteristics of the system was explored. The results show that the dynamic meshing stiffness of the surface texturing system exhibits a nonlinear state, and texture 2-F exhibits good stiffness characteristics; Different texture systems exhibit different dynamic characteristics, among which texture 2-E exhibits poorer dynamic characteristics; Compared with complete alignment, the dynamic characteristics of large misalignment systems are more complex; Eccentricity of dynamic and static mixing at high speeds can alter the stability of the system and make it non periodic in motion. This lays a theoretical foundation for the precise design of PEEK based polymer composite involute spline couplings with surface texture and the analysis of service performance based on the design of similar components.