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李炳强,马辉,杨文军.航空发动机叶片Tc4材料的非线性累积损伤及可靠度研究[J].稀有金属材料与工程(英文),2018,47(1):113~118.[Li Bing-qiang,Hui Ma,Yang Wen-jun.Nonlinear Accumulated Damage and Reliability Research of Tc4 Material Used in Aero-engine Blades[J].Rare Metal Materials and Engineering,2018,47(1):113~118.]
Nonlinear Accumulated Damage and Reliability Research of Tc4 Material Used in Aero-engine Blades
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Received:October 16, 2015  Revised:October 02, 2016
Key words: Blades  Tc4 material  Nonlinear damage  Reliability
Foundation item:国家自然科学基金资助(项目号51275081),国家自然科学基金资助(项目号51135003)
Author NameAffiliationE-mail
Li Bing-qiang School of Mechanical Engineering Automation,Northeastern University,Shenyang ibingqiang@aliyun.com 
Hui Ma School of Mechanical Engineering Automation,Northeastern University,Shenyang ma_hui@126.com 
Yang Wen-jun School of Mechanical Engineering Automation,Northeastern University,Shenyang  
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      To determine the damage and life distribution of Tc4 material used in aero-engine blades under different stress ratio, axial tension and compression fatigue test is conducted. Nonlinear damage evolution equation is put forward for Tc4 material based on Chaboche nonlinear damage model and the fourth strength theory. Computation results are compared with W?hler curve and BP neural network model. According to the simulation and calculation results of the flow field of compressor blades in the maximum continuous working condition, the stress-time history for blades is calculated. From the viewpoint of energy dissipation, the residual strength model of Tc4 material is described based on stress strength interference. Combined with Poisson stochastic process, reliability prediction of the aero-engine’s compressor blades at maximum continuous working condition is accomplished.