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材料工程  2015 

FGH95粉末高温合金裂纹闭合效应及裂纹扩展特性研究

DOI: 10.11868/j.issn.1001-4381.2015.08.010, PP. 56-61

Keywords: 粉末高温合金,裂纹闭合,裂纹扩展,寿命预测,塑性区

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Abstract:

采用有限元方法研究FGH95粉末高温合金标准紧凑拉伸(CT)试样的塑性诱发裂纹闭合效应,分析裂纹面上的应力分布,并考察本构模型,网格密度及应力比对裂纹闭合效应的影响,进而建立考虑裂纹闭合效应下CT试样裂纹扩展寿命分析模型,并进行寿命预测。结果表明理想弹塑性模型下的裂纹闭合效应对网格单元的敏感性比多线性随动强化模型高;裂纹尖端塑性区内网格数达到20时,裂纹闭合趋于稳定;应力比增加裂纹闭合效应减小,当应力比达到0.5时裂纹闭合效应消失。修正的寿命预测模型对CT试样的预测精度比传统模型更高。

References

[1]  ELBER W. Fatigue crack closure under cyclic tension[J].Engineering Fracture Mechanics,1970,2(1):37-45.
[2]  GONZALEZ-HERRERA A,ZAPATERO J. Influence of minimum element size to determine crack closure stress by the finite element method[J].Engineering Fracture Mechanics,2004,72(3):337-355.
[3]  SOLANKI K, DANIEWICZS R, NEWMAN J C. Finite element analysis of plasticity-induced fatigue crack closure: an overview[J].Engineering Fracture Mechanics,2005,71(2):149-171.
[4]  JIANG Yan-yao,FENG Miao-lin, DING Fei. A reexamination of plasticity-induced crack closure in fatigue crack propagation[J]. International Journal of Plasticity,2004,21(9):1720-1740.
[5]  陈勇,宋迎东,高德平. FGH95 粉末高温合金裂纹闭合数值模拟[J].材料科学与工程学报,2004,22(3):347-350.CHEN Yong, SONG Ying-dong, GAO De-ping.Numerical simulation of crack closure in FGH95 powder metallurgy superalloys[J]. Journal of Materials Science & Engineering,2004,22(3):347-350.
[6]  HOU C Y. Three-dimensional finite element analysis of fatigue crack closure behavior in surface flaws[J]. International Journal of Fatigue,2004,26(11):1225-1239.
[7]  NEWMAN J C, WU X R, ZHAO W, et al.Small crack growth and fatigue life prediction for high-strength aluminum alloys: part I-experimental and fracture mechanics analysis[J].Fatigue and Fracture of Engineering Materials and Structures,1998,21(11): 1289-1306.
[8]  NEWMAN J C, WU X R, SWAIN M H, et al. Small crack growth and fatigue life prediction for high-strength aluminum alloys: part II-crack closure and fatigue analysis[J].Fatigue and Fracture of Engineering Materials and Structures,2000,23(1):59-72.
[9]  SOLANKI K, DANIEWICZ S R, NEWMAN J C. A new methodology for computing crack opening values from finite element analyses[J].Engineering Fracture Mechanics,2003,71(7):1165-1175.
[10]  陈亚龙,杨晓光. 带保载平面应变塑性诱发裂纹闭合效应[J].航空动力学报,2010,25(9):2030-2035. CHEN Ya-long,YANG Xiao-guang. Plasticity-induced fatigue crack closure under plane strain condition with dwelling[J].Journal of Aerospace Power,2010,25(9):2030-2035.
[11]  McCLUNG R C, SEHITOGLU H. On the finite element analysis of fatigue crack closure-1.basic modeling issues[J].Engineering Fracture Mechanics,1989,33(2):237-252.
[12]  BLANDFORD R S,DANIEWICZ S R,SKINN ER J D. Determination of the opening load for a growing crack: evaluation of experimental data reduction techniques and analytical models[J]. Fatigue Fract Eng Mater Struct,2002,25(1):17-26.
[13]  PARIS P C, ERDOGAN F. A critical analysis of crack propagation laws[J]. Journal of Basic Engineering Transaction of the ASME,1963,85:528-534.
[14]  魏大盛,王延荣.粉末冶金涡轮盘裂纹扩展特性分析[J].推进技术,2008,12(6):753-758. WEI Da-sheng,WANG Yan-rong. Lifing methodology of crack propagation in powder metallurgy turbine disk[J].Journal of Propulsion Technology,2008,12(6):753-758.

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