Chinese Journal of Mechanical Engineering >

2021 , Vol. 34 >Issue 6: 110 - 110

DOI: https://doi.org/10.1186/s10033-021-00625-9

Original Article

Fatigue Life Prediction of Rolling Bearings Based on Modified SWT Mean Stress Correction

  • Aodi Yu ,
  • Hong-Zhong Huang ,
  • Yan-Feng Li ,
  • He Li ,
  • Ying Zeng
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  • 1 School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China;
    2 Center for System Reliability and Safety, University of Electronic Science and Technology of China, Chengdu, 611731, China
Aodi Yu, born in 1992, is currently a PhD candidate at School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, China. Her main research interests include fatigue life prediction and reliability modeling and analysis;
He Li, born in 1990, is currently a PhD candidate at School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, China. His main research interests are failure and risk analysis, reliability and availability estimation;
Ying Zeng, born in 1994, is a PhD candidate at School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, China. His current research interest focuses on reliability and fault prediction of electronic products

收稿日期: 2020-12-15

  修回日期: 2021-09-17

  网络出版日期: 2022-04-03

基金资助

This study is financially supported by the National Natural Science Foundation of China (Grant No. 51875089).

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Fatigue Life Prediction of Rolling Bearings Based on Modified SWT Mean Stress Correction

  • Aodi Yu ,
  • Hong-Zhong Huang ,
  • Yan-Feng Li ,
  • He Li ,
  • Ying Zeng
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  • 1 School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China;
    2 Center for System Reliability and Safety, University of Electronic Science and Technology of China, Chengdu, 611731, China

Received date: 2020-12-15

  Revised date: 2021-09-17

  Online published: 2022-04-03

Supported by

This study is financially supported by the National Natural Science Foundation of China (Grant No. 51875089).

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摘要

The existing engineering empirical life analysis models are not capable of considering the constitutive behavior of materials under contact loads; as a consequence, these methods may not be accurate to predict fatigue lives of rolling bearings. In addition, the contact stress of bearing in operation is cyclically pulsating, it also means that the bearing undergo non-symmetrical fatigue loadings. Since the mean stress has great effects on fatigue life, in this work, a novel fatigue life prediction model based on the modified SWT mean stress correction is proposed as a basis of which to estimate the fatigue life of rolling bearings, in which, takes sensitivity of materials and mean stress into account. A compensation factor is introduced to overcome the inaccurate predictions resulted from the Smith, Watson, and Topper (SWT) model that considers the mean stress effect and sensitivity while assuming the sensitivity coefficient of all materials to be 0.5. Moreover, the validation of the model is finalized by several practical experimental data and the comparison to the conventional SWT model. The results show the better performance of the proposed model, especially in the accuracy than the existing SWT model. This research will shed light on a new direction for predicting the fatigue life of rolling bearings.

关键词： Rolling bearings; Fatigue life prediction; Modified SWT model; Mean stress correction

本文引用格式

Aodi Yu , Hong-Zhong Huang , Yan-Feng Li , He Li , Ying Zeng . Fatigue Life Prediction of Rolling Bearings Based on Modified SWT Mean Stress Correction[J]. Chinese Journal of Mechanical Engineering, 2021 , 34(6) : 110 -110 . DOI: 10.1186/s10033-021-00625-9

Abstract

The existing engineering empirical life analysis models are not capable of considering the constitutive behavior of materials under contact loads; as a consequence, these methods may not be accurate to predict fatigue lives of rolling bearings. In addition, the contact stress of bearing in operation is cyclically pulsating, it also means that the bearing undergo non-symmetrical fatigue loadings. Since the mean stress has great effects on fatigue life, in this work, a novel fatigue life prediction model based on the modified SWT mean stress correction is proposed as a basis of which to estimate the fatigue life of rolling bearings, in which, takes sensitivity of materials and mean stress into account. A compensation factor is introduced to overcome the inaccurate predictions resulted from the Smith, Watson, and Topper (SWT) model that considers the mean stress effect and sensitivity while assuming the sensitivity coefficient of all materials to be 0.5. Moreover, the validation of the model is finalized by several practical experimental data and the comparison to the conventional SWT model. The results show the better performance of the proposed model, especially in the accuracy than the existing SWT model. This research will shed light on a new direction for predicting the fatigue life of rolling bearings.

Key words： Rolling bearings; Fatigue life prediction; Modified SWT model; Mean stress correction

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