Reliability Assessment of Spring Based on Two Degradation Modeling Methods

As basic components, springs are widely used in aerospace, mechanical and electrical fields. Due to their various functions such as buffer, energy storage and polarization, springs are playing an increasingly important role in various fields. In the long-term storage process, due to environmental factors such as temperature, the spring will be degraded, manifested as the stress relaxation phenomenon, and the process is that as the storage time increases, the elasticity of the spring slowly declines, and the load capacity slowly decreases, the torque changes while the spring is released. In this paper, the variation of spring torque under different stress is taken as the degradation of the spring, and the reliability analysis of the springs' experimental data based on the degradation distribution is analyzed by using the stochastic process degradation modeling method and the generalized degenerate modeling method respectively. The advantages and disadvantages of different methods will be given, it provides a reliable and effective way to analyze the degradation process of springs.