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Title: Study of hypervelocity projectile impact on thick metal plates

Hypervelocity impacts generate extreme pressure and shock waves in impacted targets that undergo severe localized deformation within a few microseconds. These impact experiments pose unique challenges in terms of obtaining accurate measurements. Similarly, simulating these experiments is not straightforward. This paper proposed an approach to experimentally measure the velocity of the back surface of an A36 steel plate impacted by a projectile. All experiments used a combination of a two-stage light-gas gun and the photonic Doppler velocimetry (PDV) technique. The experimental data were used to benchmark and verify computational studies. Two different finite-element methods were used to simulate the experiments: Lagrangian-based smooth particle hydrodynamics (SPH) and Eulerian-based hydrocode. Both codes used the Johnson-Cook material model and the Mie-Grüneisen equation of state. Experiments and simulations were compared based on the physical damage area and the back surface velocity. Finally, the results of this study showed that the proposed simulation approaches could be used to reduce the need for expensive experiments.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2]
  1. Univ. of Nevada, Las Vegas, NV (United States). Dept. of Mechanical Engineering
  2. National Security Technologies, LLC. (NSTec), Las Vegas, NV (United States)
Publication Date:
OSTI Identifier:
1242256
Report Number(s):
DOE/NV/25946--2392
Journal ID: ISSN 1070-9622
Grant/Contract Number:
AC52-06NA25946
Type:
Accepted Manuscript
Journal Name:
Shock and Vibration
Additional Journal Information:
Journal Name: Shock and Vibration; Journal ID: ISSN 1070-9622
Publisher:
Hindawi
Research Org:
National Security Technologies, LLC. (NSTec), Las Vegas, NV (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS hypervelocity impact; photonic Doppler velocimetry (PDV); smooth particle hydrodynamics (SPH); Eulerian-based hydrocode; A36 steel