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航空学报  2013 

腐蚀/疲劳交替作用下飞机金属材料疲劳寿命计算方法

DOI: 10.7527/S1000-6893.2013.0200, PP. 1114-1121

Keywords: 腐蚀,疲劳,2A12-T4铝合金,均匀分布,神经网络

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Abstract:

使用环境下飞机金属结构剩余寿命评定是确定飞机结构疲劳寿命与日历寿命关系的关键。为此,本文模拟飞机结构经历的"地面腐蚀+空中疲劳"过程,提出了腐蚀/疲劳交替作用下飞机金属材料的疲劳寿命计算方法。首先,通过分析2A12-T4铝合金试样预腐蚀/疲劳试验结果,发现其在模拟腐蚀/疲劳交替作用时计算得到的疲劳寿命偏于保守。随后,根据2A12-T4铝合金试样真实的交替试验结果,采用回归算法,建立了基于均匀分布耦合损伤形式的腐蚀/疲劳交替寿命计算模型;并分别采用BP、Elman神经网络对上述模型的计算结果进行验证。结果表明,本文提出的均匀分布耦合损伤模型计算结果与真实试验结果吻合较好;通过进一步的计算与试验对比发现,该模型也可以用于加载循环与腐蚀周期组合发生变化时的疲劳寿命预测,具有较好的适用性。

References

[1]  Wang Q Y, Kawagoishi N, Chen Q, et al. Evaluation of the probability distribution of pitting corrosion fatigue life in aircraft materials. Acta Mechanica Sinica, 2003, 19(3): 247-252.
[2]  Dolley E J, Lee B, We R P. The effect of pitting corrosion on fatigue life. Fatigue & Fracture of Engineering Materials & Structures, 2000, 23(7): 555-560
[3]  van der Walde K, Hillberry B M. Initiation and shape of development of corrosion-nucleated fatigue cracking. International Journal of Fatigue, 2007, 29(10): 1269-1281.
[4]  Chubb J P, Morad T A, Hockenhull B S, et al. The effect of exfoliation corrosion on the fracture and fatigue behavior of 7178-T6 aluminium. International Journal of Fatigue, 1995, 17(1): 49-54.
[5]  Min L, Bombardier Y, Renaud G. Probabilistic risk analysis for aircraft structures with limited in-service damages. 28th International Congress of the Aeronautical Sciences, 2012: 1-11.
[6]  Liu W T, Li Y H. Aircraft structure calendar life evolution technology. Beijing: Aeronautic Industry Press, 2004. (in Chinese) 刘文珽,李玉海. 飞机结构日历寿命体系评定技术. 北京:航空工业出版社,2004
[7]  He X F, Liu W T, Jiang D B. Method for fatigue test of aircraft structures considering corrosion influence. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(1): 20-22. (in Chinese) 贺小帆,刘文珽,蒋东滨. 一种考虑腐蚀影响的飞机结构疲劳试验方法. 北京航空航天大学学报,2003, 29(1):20-22.
[8]  Zhang F Z, Tan W D, Song J, et al. Effect of corrosion temperature on fatigue life of aircraft. Acta Aeronautica et Astronautica Sinica, 2004, 25(5): 473-475. (in Chinese) 张福泽, 谭卫东, 宋军, 等. 腐蚀温度对飞机疲劳寿命的影响. 航空学报, 2004, 25(5): 473-475.
[9]  Li Y H, He X F, Chen Q Z, et al. Investigation and variable rule for corrosion depth of aluminum specimen. Journal of Beijing University of Aeronautics and Astronautics, 2002, 28 (1): 98-101. (in Chinese) 李玉海, 贺小帆, 陈群志, 等. 铝合金试件腐蚀深度分布特性及变化规律研究. 北京航空航天大学学报, 2002, 28(1): 98-101.
[10]  Cui C J, Chen Q Z, Wang Y Y, et al. Corrosion behavior of LY12CZ aluminum alloy in a laboratory simulated atmospheric environment of one airport. Corrosion Science and Projection Technology, 2009, 21(3): 291-294. (in Chinese) 崔常京, 陈群志, 王逾涯, 等. 模拟某机场大气环境下LY12CZ铝合金的腐蚀行为及其当量关系的建立. 腐蚀科学与防护技术, 2009, 21(3): 291-294.
[11]  Zhang Y H. The corrosion damage and its effect on life of aircraft structure. Xi'an: Northwestern Polytechnical University, 2007. (in Chinese) 张有宏. 飞机结构的腐蚀损伤及其对寿命的影响. 西安:西北工业大学,2007.
[12]  Chen Y L, Jin P, Lin D X, et al. Naval aircraft structure corrosion control and strength evaluation. Beijing: National Defence Industry Press, 2009. (in Chinese) 陈跃良,金平,林典雄, 等. 海军飞机结构腐蚀控制及强度评估. 北京: 国防工业出版社, 2009.
[13]  Chen Q Z, Yang R Q, Li G Y, et al. Influence of corrosion on fatigue life of 30CrMnSiNi2A steel structure. Equipment Environment Engineering, 2007, 4(5): 7-10. (in Chinese) 陈群志, 杨瑞琴, 李国元, 等. 腐蚀对30CrMnSiNi2A钢结构疲劳寿命的影响. 装备环境工程, 2007, 4(5): 7-10.
[14]  Yang X H, Yao W X, Chen Y L. Research calendar life of aircraft structure considering the effects of calendar environment. Chinese Journal of Applied Mechanics, 2002, 19(3): 157-159. (in Chinese) 杨晓华, 姚卫星, 陈跃良. 考虑日历环境影响的结构日历寿命研究. 应用力学学报, 2002, 19(3): 157-159.
[15]  Fan C H. Study on some critical problem for single aircraft structure life surveillance. Xi'an: Air Force Engineering University, 2010. (in Chinese) 范超华. 飞机结构单机寿命监控若干关键问题研究. 西安: 空军工程大学,2010.
[16]  Menan F, Henaff G. Influence of frequency and exposure to a saline solution on the corrosion fatigue crack growth behavior of aluminum alloy 2024. International Journal of Fatigue, 2009, 31(33): 1684-1695.
[17]  Menan F, Henaff G. Synergistic action of fatigue and corrosion during crack growth in the 2024 aluminium alloy. Procedia Engineering, 2010, 2(3): 1441-1450.
[18]  Xie L Y, Lv W G, Shi Z F. Experimental study on fatigue damage under two level loading. Journal of Mechanical Strength, 1994, 16(3): 589-594. (in Chinese) 谢里阳, 吕文阁, 师照峰. 两级载荷作用下疲劳损伤状态的实验研究. 机械强度, 1994, 16(3): 589-594.
[19]  Zhang H W, He Y T, Wu L M, et al. Corrosion/fatigue alternative life predicting methodology for aircraft metal structures in consideration of static-stress. Chinese Journal of Applied Mechanics, 2012, 29(5): 589-594. (in Chinese) 张海威, 何宇廷, 伍黎明, 等. 考虑静强度要求的飞机金属结构腐蚀/疲劳交替寿命预测方法. 应用力学学报, 2012, 29(5): 589-594.
[20]  Sriaman M R, Pidapati R M. Life prediction of aircraft aluminum subjected to pitting corrosion under fatigue condition. Journal of Aircraft, 2009, 46(4): 1253-1259.
[21]  Merati A. A study of nucleation and fatigue behavior of an aerospace aluminium alloy 2024-T3. International Journal of Fatigue, 2005, 27(10): 33-44.

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