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| Numerical Calculation of Thermochemical-Mechanical Erosion on the Barrel Chamber |
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| DOI：10.7643/issn.1672-9242.2022.07.009 |
| KeyWord:frictional heat chamber temperature erosion wear HDL numerical analysis |
| Author | Institution |
| LI Shu-li |
Nanjing University of Science and Technology, Nanjing , China |
| WANG Li-qun |
Nanjing University of Science and Technology, Nanjing , China |
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| Abstract: |
| The paper aims to explore the mechanism of barrel erosion and wear, improve the thermochemical-mechanical erosion and wear model, and guide life prediction and structural design of artillery barrel. In this paper, a thermal chemical erosion model considering frictional heat is proposed based on the friction behavior of the projectile-barrel coupling system. The HDL friction is used to replace the dry friction based on the Archard wear theory and the principle of HDL, and mechanical wear model is proposed. Numerical calculations are carried out on the derived erosion and wear model. The erosion and wear of the chamber in the barrel is mainly concentrated in the position of the forcing cone and muzzle. The maximum radial and circumferential erosion of the bullet forcing cone after 500 shots are 1.3 mm and 0.8 mm, the maximum radial and circumferential wear of the muzzle are 0.32 mm and 0.26 mm. The results show that the erosion and wear model can more accurately describe the material degradation of the chamber. The numerical simulation results are in good agreement with the actual rifling erosion and wear. |
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