Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지
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Numerical Study on Ricochet Behavior with Inclined Impact of Polycabonate Plates

폴리카보네이트 판의 경사충격에 의한 도비 거동 수치연구

  • Yang, Tae-Ho (Department of Mechanical Design Engineering, Chungnam National University) ;
  • Lee, Young-Shin (Department of Mechanical Design Engineering, Chungnam National University) ;
  • Jo, Jong-Hyun (LG Chem. Ltd./Research)
  • 양태호 (충남대학교 기계설계공학과) ;
  • 이영신 (충남대학교 기계설계공학과) ;
  • 조종현 (LG 화학 기술연구원)
  • Received : 2013.09.24
  • Accepted : 2014.07.21
  • Published : 2014.08.31
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Abstract

In this study, the numerical simulation using AUTODYN-3D program was investigated angle trajectory prediction for inclined impacts of projectiles. The penetration and perforation of polycarbonate plate by 7.62 mm projectile was investigated numerically. The characteristic structure of the projectile's trajectory in the polycabonate plates was studied. Two combined failure criteria were used in the target plate, and the target plate was modeled with the properties of polycarbonate for simulating the ricochet phenomenon. The effect of the angle of inclination on the trajectory and kinetic energy of the projectile were studied. The dynamic deformation behaviors tests of polycabonate were compared with numerical simulation results which can be used as predictive purpose. From the simulation, the ricochet phenomenon was occurred for angles of inclination of $0^{\circ}{\leq}{\theta}{\leq}20^{\circ}$. The projectile perforated the plate for ${\theta}{\leq}30^{\circ}$, thus defining a failure envelope for numerical configuration. The numerical analyses are used to study the effect of the projectile impact velocity on the depth of penetration (DOP). It can be observed that the residual velocities were almost linear relative to penetration velocities. It means that polycarbonate has high resistance at higher velocities.

Keywords

References

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