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Performance of a flying cross bar to incapacitate a long-rod penetrator based on a finite element model

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Abstract

Performance of a flying cross bar, instead of the flying plate, to incapacitate the long-rod penetrator, has been evaluated numerically based on a finite element model. The length to diameter ratio, L/D, of the penetrator was 30 and the velocity was 2.0 km/s. The length of the cross bar was fixed to 0.5L and the velocity of the bar was determined from its mass and given kinetic energy. The bar was assumed to impact the mid point of the penetrator at 45° of obliquity. The efficiency of flying cross bar is maximum when the diameter of the bar is in the range between 1D and 4D depending on the energy of the bar and the distance to witness block. The protection capability of the bar has been discussed in terms of the shape and lateral displacement of the disturbed penetrator by the flying cross bar.

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Notes

  1. Hitting the midpoint of the penetrator would be rare in practical situation; The cases of hitting other points will be the subject of a future work.

  2. In Table 3, the decrease of velocity after the impact is so small; The velocity ratio (V/V o) of 0.97~0.99 may be within the margin of errors.

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Acknowledgments

This work was financially supported by Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the MEST (2010-0004150).

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Authors and Affiliations

  1. Technology Development Centre, Agency for Defence Development, P.O. Box 35-1, Yuseong, Daejeon, 305-600, Republic of Korea

    Yo-Han Yoo

  2. Korea Institute of Construction Technology, Goyang, Gyeonggi-do, 411-712, Republic of Korea

    Seung Hoon Paik

  3. Department of Automotive Engineering, Seoul National University of Science and Technology, Sungbuk-gu, 139-743, Republic of Korea

    Jong-Bong Kim

  4. Department of Materials Engineering, Gangneung-Wonju National University, Gangneung, Gangwong-do, 210-702, Republic of Korea

    Hyunho Shin

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  1. Yo-Han Yoo
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  2. Seung Hoon Paik
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  4. Hyunho Shin
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Correspondence to Hyunho Shin.

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Yoo, YH., Paik, S.H., Kim, JB. et al. Performance of a flying cross bar to incapacitate a long-rod penetrator based on a finite element model. Engineering with Computers 29, 409–415 (2013). https://doi.org/10.1007/s00366-012-0257-y

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  • DOI: https://doi.org/10.1007/s00366-012-0257-y

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