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| Numerical Simulation of Projectile Shape Effect on Honeycomb Sandwich Panels Impacted at Ultra-high Velocity |
| Received:March 20, 2024 Revised:April 07, 2024 |
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| DOI：10.7643/issn.1672-9242.2024.07.015 |
| KeyWord:AUTODYN honeycomb sandwich panel FEM-SPH coupling hypervelocity impact shape effect of projectile numerical simulation |
| Author | Institution |
| LI Xinbing |
School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang , China |
| ZHAO Yifei |
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| WU Bi |
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| Abstract: |
| The work aims to conduct numerical simulation to study the energy transfer and damage mechanism of honeycomb sandwich panels under the impact of hypervelocity vertical incidence of projectiles with different shapes. The fixed FEM-SPH coupling method was used. The numerical simulation model was verified by comparing with the NASA experimental results. The verified model was used to further study and compare the effects of conical, cubic and spherical projectiles on the energy absorption efficiency and damage distribution of honeycomb sandwich panels. The damage area of the front and rear panels increased with the increase of the impact velocity, and the energy absorption and damage area of the honeycomb core layer also increased with the increase of the impact velocity. The increase of the aspect ratio D/H led to the decrease of the energy absorption efficiency of the front panel and the rear panel, while the absorption efficiency of the honeycomb core layer increased. The change of the impact position directly affected the mass distribution of the projectile fragments in the honeycomb core, the expansion area of the debris cloud and the damage morphology of the rear panel. The results show that factors such as projectile shape, impact location and velocity have significant effects on the damage characteristics, energy absorption efficiency and damage distribution of honeycomb sandwich panels. |
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