Fatigue life prediction of aluminum alloy with pre-corrosion damage based on damage mechanics

被引：0
|
作者：
Zhan Z. [1 ,2 ]
Yu X. [3 ]
Hu W. [1 ]
Meng Q. [1 ]
机构：
[1] School of Aeronautic Science and Engineering, Beihang University, Beijing
[2] Shen Zhen Institute of Beihang University, Shenzhen
[3] China Helicopter Research and Development Institute, Jingdezhen
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2021年 / 47卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Aluminum alloy; Corrosion; Damage mechanics; Fatigue damage; Finite element;
D O I：
10.13700/j.bh.1001-5965.2020.0477
中图分类号：
学科分类号：
摘要：
In engineering structures, the corrosion fatigue failure is a common phenomenon. The fatigue crack often occurs around the corrosion pit, which seriously affects the fatigue characteristics of materials. In this paper, based on the continuous damage mechanics, a method is proposed for the fatigue life prediction of aluminum alloy with pre-corrosion damage. First, the influence of corrosion is studied from two aspects: one is the local initial damage caused by corrosion, and the other one is the local stress concentration caused by corrosion pit. Then, the fatigue damage evolution equations considering pre-corrosion damage are established and the related numerical solution is implemented. After that, according to the results of pre-corrosion fatigue test and numerical prediction, the initial damage of material caused by pre-corrosion is obtained. Finally, the fatigue life of the aluminum alloy with pre-corrosion pit is predicted by the proposed method, and the predicted results are compared with the experimental results, which verifies the effectiveness of the proposed method. © 2021, Editorial Board of JBUAA. All right reserved.
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收藏
页码：2434 / 2441
页数：7
相关论文
共 25 条
  • [1] Fatigue of structures and materials, (2014)
  • [2] YAO W X., Fatigue life analysis of structures, (2003)
  • [3] CHEN Y J, LIU C C, ZHOU J, Et al., Multiaxial fatigue behaviors of 2024-T4 aluminum alloy under different corrosion conditions[J], International Journal of Fatigue, 98, pp. 269-278, (2017)
  • [4] DENG J H, CHEN P J, FU Y., Parabolic model of equivalent crack approach for predicting fatigue life of pre-corroded aluminum alloy, Acta Aeronautica et Astronautica Sinica, 39, 2, pp. 146-156, (2018)
  • [5] CO N E C, BURNS J T., Effects of macro-scale corrosion damage feature on fatigue crack initiation and fatigue behavior[J], International Journal of Fatigue, 103, pp. 234-247, (2017)
  • [6] MU Z T, CHEN D H, ZHU Z T, Et al., Fatigue crack growth behavior of aerospace aluminum alloy LD2 under corrosion, Acta Aeronautica et Astronautica Sinica, 34, 3, pp. 574-579, (2013)
  • [7] DENG L, YAN W, NIE L., A simple corrosion fatigue design method for bridges considering the coupled corrosion-overloading effect, Engineering Structures, 178, pp. 309-317, (2019)
  • [8] TAN X M, ZHANG D F, BIAN G X, Et al., Effect of corrosion damage on fatigue crack initiation mechanism and growth behavior of high strength aluminum alloy, Journal of Mechanical Engineering, 50, 22, pp. 76-83, (2014)
  • [9] EL MAY M, PALIN-LUC T, SAINTIER N, Et al., Effect of corrosion on the high cycle fatigue strength of martensitic stainless steel X12CrNiMoV12-3[J], International Journal of Fatigue, 47, pp. 330-339, (2013)
  • [10] LIU Z G, WANG H D, JIA M M., Quantitative influence analysis of aero aluminum alloy pitting corrosion morphology to stress concentration factor, Structure & Environment Engineering, 45, 1, pp. 25-31, (2018)
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