A modified nonlinear fatigue damage accumulation model for life prediction of rolling bearing under variable loading conditions

Abstract

During the use of rolling bearings in wind turbines, aero engines, and other equipment, they often operate under variable operating and loading conditions. The practice has shown that the sequence of these loads and their interaction has a significant impact on the fatigue life of rolling bearings. In order to better understand this issue, a modified nonlinear fatigue damage accumulation model, which considers the influences of both load sequence and load interaction, is proposed in this paper and verified using the fatigue testing data for six materials. Then, the verified model was applied to evaluate the fatigue damage accumulation and fatigue life of a rolling bearing. The results have shown that, compared with the existing models, the proposed model can more accurately predict the damage accumulation and fatigue life of the rolling bearing under variable loading conditions.

Method for statistical evaluation of cumulative damage models applied to block loading

“…New fatigue damage accumulation models are still published each year. Most recent examples are the works Pavlou, 18 Bjørheim, 19 Yu et al, 20 and Zhu et al 21 But over the course of the last 70 years, not a single one has been widely accepted as an improvement over the much disputed Miner rule. Remarkably, the new models always appear to outperform selected models to which they are compared.…”

Fatigue life prediction of high‐speed train bearings based on the generalized linear cumulative damage theory

“…It is generally recognized that the loading sequence has a great effect on the fatigue life of materials or engineering components 19–22 . Figure 6A shows the damage–fatigue life curves under different stress levels.…”

“…Therefore, the theoretical critical value of the cumulative damage D tc is where n 3 is the cyclic life of the specimen to failure under second‐stage loading ( n 3 < n ‐ n 1 ). Additionally, the general damage accumulation path of the fatigue specimen is O‐N‐N′ under low–high loading, which is mainly attributed to the “exercise effect” of cumulative damage under low loading 20 on the damage under high loading. The theoretical critical value of the cumulative damage D tc is ( n 3 > n ‐ n 2 ): …”

Open-Access Experiment Dataset for Fatigue Damage Accumulation and Life Prediction Models

“…Most notably, new fatigue damage accumulation models are still published each year. A few of the most recent examples are the works of Pavlou [11], Bjørheim [12], Yu et al [13], and Zhu et al [14]. Nonetheless, an industry relevant breakthrough remains largely absent.…”