| 高晶晶,陆楠,夏小春,刘克刚,梅宇飞,张新健,张艳,杜翠玲.某型航空钮子开关铆钉断裂失效分析及环境适应性提升[J].装备环境工程,2021,18(11):91-96. GAO Jing-jing,LU Nan,XIA Xiao-chun,LIU Ke-gang,MEI Yu-fei,ZHANG Xin-jian,ZHANG Yan,DU Cui-ling.Fracture Failure Analysis and Environmental Adaptability Improvement of Rivet for a Certain Type of Aeronautical Toggle Switch[J].Equipment Environmental Engineering,2021,18(11):91-96. |
| 某型航空钮子开关铆钉断裂失效分析及环境适应性提升 |
| Fracture Failure Analysis and Environmental Adaptability Improvement of Rivet for a Certain Type of Aeronautical Toggle Switch |
| 投稿时间：2021-03-11 修订日期：2021-05-10 |
| DOI：10.7643/issn.1672-9242.2021.11.013 |
| 中文关键词: 铆钉 湿热试验 氨 应力腐蚀断裂 环境适应性中图分类号:V229+.1 TJ04 文献标识码:A 文章编号:1672-9242(2021)11-0091-06 |
| 英文关键词:rivet humidity-heat test ammonia stress corrosion fracture environmental adaptability |
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| Author | Institution |
| GAO Jing-jing | Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China |
| LU Nan | Air Force Equipment’s NO.3 Military Representative Office in Shanghai, Shanghai 201101, China |
| XIA Xiao-chun | Air Force Equipment’s NO.3 Military Representative Office in Shanghai, Shanghai 201101, China |
| LIU Ke-gang | Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China |
| MEI Yu-fei | Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China |
| ZHANG Xin-jian | Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China |
| ZHANG Yan | Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China |
| DU Cui-ling | Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China |
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| 中文摘要: |
| 目的 解决某型航空钮子开关中H62黄铜铆钉在湿热试验后出现的断裂问题，保证钮子开关适应自然和诱导环境的能力，从而提高整机的环境适应性及可靠性。方法 采用ANSYS有限元仿真分析、扫描电子显微分析及光谱分析等方法，从整个开关系统入手，对断裂铆钉的受力状态、材质、显微组织及壳体的析出离子进行了深入分析，探明了铆钉的失效原因及机理，并提出了从零部件到产品级的对策。结果 铆钉的断裂为典型的解理断裂，断口覆盖了大量的腐蚀产物，开关壳体释放的NH4+导致铆钉产生了应力腐蚀断裂。结论 黄铜铆钉的断裂失效是由于开关下壳体在湿热环境的诱导下释放出氨气，氨气浸入到长时间受拉应力的铆钉中产生了应力腐蚀。因此，在铆钉科研试制时即需评估其在钮子开关系统中的环境适应性。 |
| 英文摘要: |
| This paper aims to solve the fracture failure problem of H62 brass rivet for a certain type of aeronautical toggle switch in humidity-heat test, guarantee the toggle switch’s ability to adapt to natural and induced environment, so as to improve the environmental adaptability and reliability of the whole machine. During the research, we adopt ANSYS Finite Element Analysis,Scanning Electron Microscope Analysis, Spectral Analysis and other methods. Starting from the whole switch system, we perform in-depth analysis of the forced state, material, microstructure and ions precipitated from the housing of the fractured rivet, ascertain the failure reason and mechanism of the rivet, and propose countermeasures from parts to product level. The fracture of rivet is a typical cleavage fracture, and the fracture is covered with a great amount of corrosion product, and the release of NH4+ from the switch housing leads to stress corrosion fracture of rivet. Conclusion could be drawn that the fracture failure of brass rivet is due to the release of ammonia gas from lower switch housing induced by the damp and hot environment, and the ammonia gas immerses into the rivet subjected to tensile stress for a long time, resulting in stress corrosion. Therefore the environmental adaptability of rivet in toggle switch system is supposed to be preferentially evaluated during scientific research and trial production. |
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