机械科学与技术2026，Vol.45Issue(7)：1101-1109,9.DOI:10.13433/j.cnki.1003-8728.20250168
承力孔孔壁微动磨损对其疲劳性能的影响
Effect of Fretting Wear at Hole Wall on Fatigue Performance of Hole
郑宏林 1汪广平 2张翔宇 3王鹏 2张建富 4冯平法5
作者信息
- 1. 清华大学 深圳国际研究生院,广东 深圳 518055
- 2. 昌河飞机工业(集团)有限责任公司,江西 景德镇 333002
- 3. 清华大学 机械工程系,北京 100084||清华大学 机械工程系 清洁高效透平动力装备全国重点实验室,北京 100084
- 4. 清华大学 机械工程系,北京 100084||清华大学 摩擦学国家重点实验室,北京 100084
- 5. 清华大学 深圳国际研究生院,广东 深圳 518055||清华大学 机械工程系,北京 100084||清华大学 摩擦学国家重点实验室,北京 100084
- 折叠
摘要
Abstract
Bearing holes in service are subjected to multiple loads,and the interaction between the hole wall and mating parts inaxial and circumferential direction induces fretting wear,thereby degrading fatigue performance.To decouple the manifestations of fretting wear and quantify their effects on fatigue,the single-factor experiments of hole-wall surface roughness and residual compressive stress of 7050 aluminum alloy are conducted.Surface roughness and residual compressive stress are controlled via milling and extrusion parameters,followed by high-frequency fatigue testing and fracture observation.Results show that when Ra is within 0.2-0.8 μm,the fatigue life is approximately 30 000 cycles with minor variation,indicating comparable stress-concentration levels under low roughness and a limited influence on life.With the increasing of residual compressive stress,fatigue life increases firstly and decreases;concomitantly,fatigue striation spacing diminishes,reflecting enhanced resistance of the hole wall to cyclic loading.The interference fit of 1.655％yields about a 30％increment of fatigue cycles comparing with the control group.However,excessive extrusion causes near-surface hardening damage and introduces stress concentrators,leading to reduced fatigue life.Overall,fretting-induced fatigue failure of bearing holes is primarily governed by the release of residual compressive stress and wear-induced stress concentration.关键词
承力孔/微动磨损/7050铝合金/表面粗糙度/残余应力/疲劳性能Key words
bearing holes/fretting wear/7050 aluminum alloy/surface roughness/residual stress/fatigue property分类
通用工业技术引用本文复制引用
郑宏林,汪广平,张翔宇,王鹏,张建富,冯平法..承力孔孔壁微动磨损对其疲劳性能的影响[J].机械科学与技术,2026,45(7):1101-1109,9.
