Effect of cold-working on corrosion induced damage in lug joints

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY Defence Technology(防务技术) Pub Date : 2024-06-01 DOI:10.1016/j.dt.2023.10.008

Ramanath M.N , Chikmath L. , Murthy H.

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Abstract

Lug joints are preferred joineries for transferring heavy loads to parent components in aerospace vehicles. They experience corrosion due to environmental conditions, improper surface finishes and rubbing displacement between the pin and lug-hole. This causes damage of different sizes and shapes near the lug-hole. Stiffness degradation due to corrosion-induced damage is modelled as a through-pit at one of the identified critical locations through stress analysis. The effect of this pit on fatigue crack initiation life is estimated. Lug-hole is pre-stressed by cold-working and the benefits of inducing plastic wake on the intended performance of the lug joint during the damages due to corrosion are brought out and compared with non-cold-worked lug-hole. Numerical analysis is performed on this lug joint with press-fit. The results obtained highlight the benefits of cold-working and the methodology can be extended to damage growth and analyse the effect of surface treatments for better structural integrity of components of aerospace vehicles.

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冷加工对凸耳接头腐蚀引起的损坏的影响

凸耳接头是将重负荷传递到航空航天飞行器母体部件的首选连接件。由于环境条件、表面处理不当以及销钉与凸耳孔之间的摩擦位移，凸耳会受到腐蚀。这会导致凸耳孔附近出现不同大小和形状的损坏。通过应力分析，将腐蚀引起的损伤导致的刚度下降模拟为已确定关键位置上的一个通坑。对该凹坑对疲劳裂纹起始寿命的影响进行了估算。通过冷加工对凸耳孔进行预应力处理，得出在腐蚀引起的损坏期间，诱导塑性唤醒对凸耳接头预期性能的益处，并将其与非冷加工凸耳孔进行比较。对这种压接式凸耳接头进行了数值分析。所获得的结果凸显了冷加工的优势，该方法可扩展到损伤增长和分析表面处理的影响，以提高航空航天飞行器部件的结构完整性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering

CiteScore

8.70

自引率

0.00%

发文量

728

审稿时长

25 days

期刊介绍： Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.