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| Analysis of Interface Failure and Life Prediction of Coating in Gun Barrel |
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| DOI：10.7643/issn.1672-9242.2022.07.006 |
| KeyWord:gun barrel coating interface failure shear fatigue damage accumulation service life prediction |
| Author | Institution |
| GENG Xue-hao |
Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute, Nanjing , China |
| LUO Tao |
Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute, Nanjing , China |
| SI Zhi-hui |
Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute, Nanjing , China |
| ZHOU Ke-dong |
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing , China |
| LIU Fei-fei |
Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute, Nanjing , China |
| GUO Xiao-yuan |
Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute, Nanjing , China |
| LI Jian |
Inner Mongolia North Heavy Industries Group Limited Company Nanjing Institute, Nanjing , China |
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| Abstract: |
| This paper aims to study the mechanism of interface failure mechanism of coating in gun barrel and predict the service life of gun barrel .Three interface failure models (interface shear failure, interface bending failure and interface crack growth failure) of coating in gun barrel are built, and the failure criterion is given correspondingly. Then a small caliber gun barrel is employed as study object and the critical failure L/h ratio of different failure models during firing process are calculated based on temperature field simulation result. By comparison of the calculation results, thus, the main interface failure way of coating in gun barrel is confirmed. Going forward, a life prediction method of gun barrel based on coating interface fatigue damage accumulation is proposed by comprehensive application of the theory of fatigue damage accumulation and the theory of coating interface failure mechanism. The life prediction model of gun barrel is built and the life of this small caliber gun barrel is predicted. In conclusion, the calculation results indicate that shear failure is the main interface failure way, and the differences between service life prediction results and life test results are less than 2%, which verifies that the prediction method proposed in this paper is feasible. |
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