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Volume 37 Issue 2
Apr 2023
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Chinese Journal of High Pressure Physics  > 2023  >  37(2): 025101.
LIU Xingwang, DENG Xuyan, QIN Qingyang, WANG Yin. Numerical Investigation on Effect of Interface Modelling of Rock-Rubble Shielding Overlays on the Anti-Penetration Capability[J]. Chinese Journal of High Pressure Physics, 2023, 37(2): 025101. doi: 10.11858/gywlxb.20220669
Citation: LIU Xingwang, DENG Xuyan, QIN Qingyang, WANG Yin. Numerical Investigation on Effect of Interface Modelling of Rock-Rubble Shielding Overlays on the Anti-Penetration Capability[J]. Chinese Journal of High Pressure Physics, 2023, 37(2): 025101. doi: 10.11858/gywlxb.20220669
shu

Numerical Investigation on Effect of Interface Modelling of Rock-Rubble Shielding Overlays on the Anti-Penetration Capability

doi: 10.11858/gywlxb.20220669
  • 1.

    Powerchina Northwest Engineering Corporation Limited, Xi’an 710065, Shaanxi, China

  • 2.

    Powerchina Southwest Headquarters, Chengdu 610036, Sichuan, China

  • 3.

    School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, Shandong, China

  • Received Date: 05 Oct 2022
  • Rev Recd Date: 27 Oct 2022
  • Accepted Date: 09 Mar 2023
    • Available Online: 13 Apr 2023
  • Issue Publish Date: 05 Apr 2023
    Abstract
  • Based on the Kong-Fang concrete material model proposed recently and the three-dimensional mesoscopic model, the penetration of a typical warhead into rock-rubble overlays was numerically simulated. The influence of interface modelling of rock-rubble overlays on the projectile overload (or acceleration), penetration depth and failure in concrete and rock was discussed by considering two well-known methods, i.e., the conode method and surface-to-surface contact method. Numerical results demonstrated that the interface between concrete and rock is overestimated when using the conode method, leading to a larger projectile acceleration and a smaller penetration depth. While the surface-to-surface contact method underestimates the interface effect, resulting in a smaller projectile acceleration and a larger penetration depth. Furthermore, the damage evolutions are different: it is continuous and develops along the interface of concrete and rock using the conode method, while it is only continuous in the area near the projectile and becomes discontinuous beyond this area. Finally, based on the numerical simulations, the practical suggestions for engineering design of rock-rubble overlays are given.

     

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