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| Investigation of Failure of Bolt Connection and Damage of Overloaded Component Caused by Armored Structure Impacted by High Velocity Kinetic Energy Projectile |
| Received:August 29, 2023 Revised:November 28, 2023 |
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| DOI：10.7643/issn.1672-9242.2024.01.002 |
| KeyWord:high velocity kinetic energy projectile armored target ballistic shock failure of bolt connections damage of overloaded component shock response spectrum |
| Author | Institution |
| QIN Jingui |
Hypervelocity Aerodynamic Institute, China Aerodynamics Research and Development Center, Sichuan Mianyang , China |
| WANG Mafa |
Hypervelocity Aerodynamic Institute, China Aerodynamics Research and Development Center, Sichuan Mianyang , China |
| PAN Ying |
Xi'an Modern Control Technology Research Institute, Xi'an , China |
| LIU Tingguo |
Xi'an Modern Control Technology Research Institute, Xi'an , China |
| LI Runwei |
Xi'an Modern Control Technology Research Institute, Xi'an , China |
| LIU Ji'an |
Xi'an Modern Control Technology Research Institute, Xi'an , China |
| HUANG Jie |
Hypervelocity Aerodynamic Institute, China Aerodynamics Research and Development Center, Sichuan Mianyang , China |
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| Abstract: |
| The work aims to verify and reveal the damage mechanisms of armored structure impacted by high velocity kinetic energy projectiles. Firstly, concentrated on the two mainly damage effects of failure of connections and damage of overloaded component caused by armored structure impacted by high velocity kinetic energy projectiles, and with the bolt connection as the typical example, the methods and materials model parameters of numerical simulation were validated by the conducted small scale tests of structure of bolt connection impacted by the high velocity sphere projectile. Secondly, the full scale tank impacted by high velocity kinetic energy projectiles was investigated by the numerical simulation and the analytical methods of shock response spectrum, and the failure characterization of bolt connections, the mainly influencing factors, and the acceleration curves and shock response spectrum curves of the typical positions on the tank were obtained. The results showed that, the input kinetic energy value of 0.042 MJ in the small scale test could not cause the fracture of bolts, whereas, the input kinetic energy value of 25.6 MJ in the full scale tank could cause the failure of connections due to the fracture of bolts. The main reason of fracture of bolts was revealed by the results of numerical simulations. The value of input kinetic energy, the diameter of connected bolts, the mass of the simulated components and the impacted position are the main influencing factors for fracture of bolts. The shock response spectrum curves of some positions on the tank are higher than the lower limit and even the upper limit of military standard, which shows that the components on these positions present high probability of failure due to the damage of overloaded. |
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