Equivalent damping characteristics of Fe-Mn alloy helical spring

Aiming at the low damping energy dissipation characteristics of ordinary helical spring, the helical spring was prepared by Fe-Mn damping alloy with energy dissipation effect, and its equivalent damping effect was studied. Firstly, the influencing factors of damping energy dissipation of Fe-Mn alloy spiral spring are analyzed by orthogonal cyclic loading experiment and digital image recognition (DIC) technology. Based on the principle of energy conservation, the mechanical model of damping spring is established, and the equivalent damping ratio of Fe-Mn alloy spiral spring is deduced to follow the law of nonlinear exponential change. At the same time, the mechanical properties and energy dissipation characteristics of Fe-Mn helical spring are simulated and compared by finite element method. The results show that the equivalent damping ratio of the Fe-Mn alloy spiral spring is not only related to the geometric parameters of the damping alloy material and the spring, but also positively correlated with the equivalent strain of the spring under the external load. These studies have laid a theoretical foundation for the further research and application of Fe-Mn spiral spring.