薄板孔边挤压强化对高周疲劳寿命影响的试验

杨兴宇; 孟祥明; 董立伟; 段家宽; 耿中行; 赵福星

薄板孔边挤压强化对高周疲劳寿命影响的试验

北京航空工程技术研究中心,北京 100076

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出版历程
- 收稿日期: 2010-01-12
- 修回日期: 2010-05-04
- 刊出日期: 2011-02-28

High cycle fatigue life experiment of sheet metal with coldworking hole

Beijing Aeronautical Engineering Technical Research Center,Beijing 100076,China

摘要

摘要: 为提高某压气机封严篦齿盘均压孔的疲劳强度,根据均压孔的具体结构形式,设计了三种冷挤压强化方法:单侧多次挤压法、柱形头挤压法和T形头挤压法.用两种材料(不锈钢1Cr11Ni2W2MoV和镍基高温合金ЗП742)设计加工了带孔薄板模拟件,用上述三种强化方法对孔边进行了强化,同时进行了室温和高温两种温度下的高周疲劳对比试验.试验结果表明,对于薄板倒圆孔,T形头挤压工艺强化效果较好,可以有效提高薄板有孔模拟件的疲劳强度.
- 带孔薄板模拟件 /
- 疲劳强度 /
- 挤压强化 /
- 高周疲劳 /
- 对比试验
Abstract: In order to enhance the fatigue strength of the pressure equalizing hole on labyrinth seal disc for a compressor,three kinds of coldworking techniques with different processes have been designed, i. e .:one-sided multiple extrusion process,cylindrical extrusion process and T shape extrusion process.High cycle fatigue tests of sheet metal specimen made of two kinds of materials with hole were conducted under room temperature and high temperature in three different processes.Test results indicate that sheet metal with coldworking hole produced in T shape extrusion process can efficiently enhance the fatigue strength.
- sheet metal specimen with hole /
- fatigue strength /
- coldworking /
- high cycle fatigue /
- comparison experiment

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参考文献(12)

[1]	中国航空科学技术研究院.飞机结构抗疲劳断裂强化设计手册[M].北京:航空工业出版社,1993.
[2]	中国航空科学技术研究院.飞机结构抗疲劳断裂强化工艺手册[M].北京:航空工业出版社,1993.
[3]	Reid L.Split sleeve cold expansion as a rework process for previously cold expanded holes .Sweden:International Committee on Aeronautical Faigue Stockholm,1993.
[4]	Link R E,Sanford R J.Residual strains surrounding split-sleeve cold expanded holes in 7075-T651 aluminum[J].J.Aircratft,1990,27(7):599-604.
[5]	Gaerke J,Zhang X,Wang Z.Life enhancement of fatigue-aged fastener holes using the cold expansion process[J].Proc.Instn.Mech.Engrs.,2000,214(2):281-293.
[6]	王智,李京珊.影响冷挤压强化效果的因素[J].机械强度,2002,24(2):302-304. WANG Zhi,LI Jingshan.Factors of influencing the beneficial effect of cold expansion[J].Journal of Mechanical Strength,2002,24(2):302-304.(in Chinese)
[7]	唐晨,于万明,云大真. 构件预挤压孔的工艺弹塑性和残余应变分析方法[J]. 大连理工大学学报,1998,38(1):25-28. TANG Chen,YU Wanming,YUN Dazhen. A method of technological elastoplactic and residual strain analyses of pre-worked holes[J]. Journal of Dalian University of Technology,1998,38(1):25-28.(in Chinese)
[8]	蒋金龙,赵名泮.冷挤压孔板残余应力场分析[J].航空学报,1991,12(10):511-513. JIANG Jinlong,ZHAO Mingpan.Analysis of residual stress field at coldworking fastener hole[J].Acta Aeronautica et Astronautica Sinica,1991,12(10):511-513.(in Chinese)
[9]	何世平,张曦,伍小平.铰孔和疲劳对冷挤压孔周残余应力的影响[J].试验力学,1996,11(4):463-467. HE Shiping,ZHANG Xi,WU Xiaoping.The influence of reaming and fatigue on the redual stress around cold-expanded holes[J].Journal of Experimental Mechanics,1996,11(4):463-467.(in Chinese)
[10]	米谷茂.残余应力的产生和对策[M].朱荆璞,邵会孟,译.北京:机械工业出版社,1983.
[11]	Bernard M,Bui-Quoc T,Burlat M.Effect of re-coldworking on fatigue life enhancement of a fastener hole[J].Fatigue and Fracture of Engineering Materials and Structures,1995,18(7/8):765-775.
[12]	Cathey W H,Grandt A F,Jr.Fracture mehcannics consideration of residual stresses introduced by coldworking fastener holes[J].Journal of Engineering Materials and Technology,1980,102(4):85-91.