|
|
| |
| 表面渗碳材料滚动接触疲劳的等效计算模型 |
| Equivalent computation models for the rolling contact fatigue analysis of surface carburized materials |
| 投稿时间：2025-04-11 修订日期：2025-06-10 |
| DOI： |
| 中文关键词: 滚动接触疲劳 表面渗碳材料 等效计算模型 弹塑性损伤本构 疲劳寿命预测 |
| 英文关键词:rolling contact fatigue surface carburized material equivalent computational models damage-coupled elasto-plastic constitutive model fatigue life prediction |
| 基金项目:中国科学院战略性先导科技专项 (XDB0620103) |
|
| 摘要点击次数: 13 |
| 全文下载次数: 0 |
| 中文摘要: |
| 表面渗碳材料的滚动接触疲劳是对齿轮、轴承等关键结构件进行失效分析的核心研究内容，现有等效计算模型在计算量和预测结果上存在显著差异，给工程设计分析带来困扰。本文基于渗碳钢接触疲劳试验结果，结合连续损伤力学和弹塑性本构，建立了两种等效计算模型：三维滚子接触有限元模型、长方体等效有限元模型，并确定了损伤演化和本构模型参数，开展了滚动接触疲劳寿命预测计算。结果表明，当接触压力较低时，两种有限元模型预测结果与试验吻合良好；当接触压力较高时，三维滚子模型预测结果较好，而长方体等效模型结果偏低。在此基础上，对比分析了两种模型的特点和产生偏差的机理。该研究可为表面渗碳材料的齿轮、轴承等关键构件的接触疲劳寿命分析以及相应的计算软件研发提供参考。 |
| 英文摘要: |
| Rolling contact fatigue (RCF) of surface-carburized materials is an important research task for the failure analysis of key structural components such as gears and bearings. Existing equivalent computation models exhibit significant discrepancies in computational efficiency and accuracy, posing challenges for engineering applications. Based on RCF test results of carburized steel, two distinct equivalent computation models were established: a three-dimensional roller contact finite element (FE) model and a cuboid equivalent FE model. The elastoplastic constitutive model integrated with continuous damage evolution are used in the FE models. Parameters of the constitutive model were determined using test data, and RCF life calculations were subsequently performed. The results indicate that both FE models show good agreement with test data under low contact pressures. At higher contact pressures, the three-dimensional roller model provides more accurate predictions, while the cuboid equivalent model underestimates fatigue life. Characteristics and underlying mechanisms for prediction deviations of the two models were investigated and discussed in details. The study can offer valuable insights for RCF life analysis and computational software development for surface-carburized structures. |
| 查看/发表评论 下载PDF阅读器 |
