钛合金榫头微动疲劳试验研究现状与发展

综述了涡轮发动机钛合金叶片榫头微动疲劳失效的两种试验方法(轴向微动疲劳试验和榫型微动疲劳试验)的研究现状。轴向微动疲劳试验技术适用于微动疲劳失效机理的研究,应用于抗微动疲劳防护层试验验证的研究也较多;而榫型微动疲劳试验技术则多用于力学分析和模型建立等方面。榫头微动疲劳问题的研究还远未完善,应综合运用微动磨损、轴向微动疲劳和榫型微动疲劳等技术,并配合有限元分析手段,开展微动疲劳机理、多因素影响及防护层作用等方面的系统研究。

Present Situation and Development of Titanium Alloy Dovetail Fretting Fatigue Test

This paper introduces two approaches to research the titanium alloy blade-disk dovetail fretting fatigue failure of turbine engine： the axial and dovetail fretting fatigue tests .The former is mainly used to study the failure mechanisms and the fretting resistance of protective layer .The latter is used to do mechanical analysis and numerical simulation .Integrated use of fretting wear , axial and dovetail fretting fatigue test and finite element analysis method to do the system research of fretting fatigue mechanism , factors and the property of protective layers is the key to complete the complex fretting fatigue failure research of the blade-disk in aeroengine turbine .