基于飞行载荷的LC9铝合金腐蚀疲劳裂纹扩展
Fatigue Crack Growth in Corrosion Damage of LC9Aluminum Alloy Basedon Aircraft Loading
摘 要
通过在EXCO溶液中浸润不同时间获得了LC9铝合金不同程度的腐蚀损伤,研究了在飞行谱作用下的LC9铝合金腐蚀坑萌生裂纹的扩展行为。结果表明,腐蚀损伤会严重降低试件的疲劳寿命,且腐蚀坑深度是描述腐蚀损伤和预测疲劳寿命的合适特征参数。基于AFGROW软件对预腐蚀试件疲劳寿命进行了预测,获得了较为有价值的结果。
腐蚀损伤
变幅载荷
裂纹扩展
疲劳寿命预测
fatigue
corrosion damage
variable amplitude loading
crack growth
fatigue life prediction
Abstract
The fatigue crack growth behavior of LC9aluminum alloy subjected to a transport aircraft loadingspectrum was studied by immersing LC9aluminum alloy in EXCO solution for different times to produce differentdegrees of corrosion damage.The results show that the corrosion damage can reduce the fatigue life of LC9aluminumalloy severely.The depth of the corrosion pit was a suitable parameter for characterizing the corrosion damage and forpredicting the fatigue life of LC9aluminum alloy using commercial fatigue crack growth software.
中图分类号 TG115
所属栏目 试验研究
基金项目 国家自然科学基金(11072124)
收稿日期 2013/1/2
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备注李旭东,讲师,硕士,
引用该论文: LI Xu-dong,LIU Zhi-guo,MU Zhi-tao,ZHU Wu-feng. Fatigue Crack Growth in Corrosion Damage of LC9Aluminum Alloy Basedon Aircraft Loading[J]. Corrosion & Protection, 2013, 34(11): 985
被引情况:
【1】李旭东,穆志韬,孔光明, "铝合金板预腐蚀坑萌生疲劳裂纹的几何构型",腐蚀与防护 36, 72-75(2015)
【2】李旭东,孔光明,穆志韬, "穿透型疲劳裂纹扩展与铝合金局部点蚀损伤特征参数的依存性分析",腐蚀与防护 36, 1049-1052(2015)
【3】李旭东,穆志韬,刘治国, "预腐蚀铝合金贯穿疲劳裂纹扩展行为的统一表征模型",腐蚀与防护 36, 648-651(2015)
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【3】Pearson S.Initiation of fatigue cracks in commercial a-luminum alloys and the subsequent propagation of veryshort cracks.Engineering Fracture Mechanics,1975,7(2):235-247.
【4】Lemmatize J,Caroche J L.Mechanics of solid Materi-als[M].Cambridge:Cambridge University Press,1990.
【5】Wang J.Low cycle fatigue and cycle dependent creepwith continuum mechanics[J].Int J Damage Mech,1992,1(2):237-244.
【6】姜菊生,许金泉.金属材料疲劳损伤的电阻研究法[J].机械强度,1999,21(3):232-234.
【7】姜菊生,张伟根,郭乙木,等.金属材料疲劳损伤的定量研究[J].材料科学与工程,2000,18(1):43-46.
【8】Wang Xi-shu,Kawagoishi Norio.A simple predictingmethod of fatigue crack growth rate based on a tensilestrength of carbon steel[J].Journal of Iron and SteelResearch International,2003,10(2): 58-62.
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