A unified model for bending fatigue life prediction of surface-hardened gears

被引：6

作者：

He, Haifeng ^{[1
]}

Liu, Heli ^{[2
]}

Wu, Quan ^{[1
]}

Chen, Huawei ^{[1
]}

机构：

[1] Guizhou Normal Univ, Sch Mech & Elect Engn, Guiyang 550025, Peoples R China

[2] Imperial Coll London, Dept Mech Engn, London SW7 2AZ, England

来源：

ENGINEERING FAILURE ANALYSIS | 2024年 / 157卷

关键词：

Gear bending fatigue; Residual stress; Hardness; Unified stress-life (S-N) equation; ROLLING-CONTACT FATIGUE; RESIDUAL-STRESS; LOW-TEMPERATURE; STRENGTH; TOOTH; BEHAVIOR; HARDNESS; LIMIT;

D O I：

10.1016/j.engfailanal.2024.107964

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The surface hardness and residual stress (RS) states significantly affect gear bending fatigue, and further mainly determines the reliability of the high-end equipment such as helicopters and electric automobiles. To date, there has been limited research focusing on the study of the quantitative connection between fatigue life and such surface integrity characteristics. In this paper, a damage-coupled gear bending fatigue model based on the continuum damage theory is established to calculate the gear fatigue life considering RS and hardness states. Then, unified gear bending stress-life (S-N) equations originating from the Basquin equation are derived to evaluate the quantitative effects of RS and hardness on gear bending fatigue life. The RS and hardness impact coefficients in unified equations are determined using the fatigue data obtained from a gear damage-coupled model. The unified gear bending S-N curves are verified using the experimental fatigue life data of shot peening and un-peening gears. These lead to the establishment of the unified equation integrating both the residual stress and surface hardness states for 18CrNiMo7-6 gear.

引用

页数：17

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