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Volume 33 Issue 4
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Chinese Journal of High Pressure Physics  > 2019  >  33(4): 044102.
PENG Kefeng, PAN Hao, ZHAO Kai, ZHENG Zhijun, YU Jilin. Dynamic Compaction Behaviors of Copper Powders Using Multi-Particle Finite Element Method[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 044102. doi: 10.11858/gywlxb.20180665
Citation: PENG Kefeng, PAN Hao, ZHAO Kai, ZHENG Zhijun, YU Jilin. Dynamic Compaction Behaviors of Copper Powders Using Multi-Particle Finite Element Method[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 044102. doi: 10.11858/gywlxb.20180665
shu

Dynamic Compaction Behaviors of Copper Powders Using Multi-Particle Finite Element Method

doi: 10.11858/gywlxb.20180665
  • 1.

    CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China

  • 2.

    Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

  • Received Date: 18 Oct 2018
  • Rev Recd Date: 23 Nov 2018
    Abstract
  • The meso-scale characteristics of granular metal materials play an important role in macroscopic mechanical behavior. The dynamic compression behavior of metal powders still needs further researches. In this paper, the copper powders persisting rich experimental results were selected as the research objects. Based on the multi-particle finite element method, a two-dimensional numerical analysis model of granular metal materials was established, and the mechanical behavior of copper powders under impact compression was studied. The numerical results show that the granular metal materials exhibit a highly localized deformation band under high velocity impact, and the deformation bands propagate from the impact end to the support end like a shock wave. By using the velocity field calculation method, the position of the plastic impact wave front was calculated, and the Hugoniot relationship between the particle velocity and the shock wave velocity of copper powders with different porosities (0.25–0.60) was obtained. The numerical results agree well with the experimental results at high impact velocities (200–300 m/s). The shock wave model using the dynamic locking strain as the only parameter was developed. It is found that the Hugoniot relationship and the stress behind the shock wave front of the copper powders under high velocity impact are well characterized.

     

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