Terminal Ballistics Study of Deformable Projectile Penetrating Brittle Material Targets for Free-surface andCrack Region Effects

KONG Xiang-zhen;FANG Qin;WU Hao

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2014, Vol. 35 ›› Issue (6) : 814-821. DOI: 10.3969/j.issn.1000-1093.2014.06.010
Paper

Terminal Ballistics Study of Deformable Projectile Penetrating Brittle Material Targets for Free-surface andCrack Region Effects

  • KONG Xiang-zhen, FANG Qin, WU Hao
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Abstract

The decay function for the free-surface effect is constructed by treating a target as an incompressible Mohr-Coulomb material and assuming that the cavity expansion produces a plastic-crack-elastic response region. The semi-empirical forcing function of brittle targets for oblique penetration is obtained by multiplying the semi-empirical forcing function of brittle targets with the decay function. Then the projectile is modeled with an explicit transient dynamic finite element code and the target is represented by the forcing function as the pressure boundary condition. This methodology eliminates the need for discretizing the target as well as the need for the contact and erosion algorithms, which reduces the computer time and memory requirements. The oblique penetration of 4340（RC44.5）steel into limestone target is simulated. The comparisons of the final forms of projectile and the final positions of tip in simulation and experiment demonstrate the effectiveness and advantage of the proposed method.

Key words

ordnance science and technology / oblique penetration / free-surface effect / finite cavity expansion / numerical simulation

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KONG Xiang-zhen, FANG Qin, WU Hao. Terminal Ballistics Study of Deformable Projectile Penetrating Brittle Material Targets for Free-surface andCrack Region Effects. Acta Armamentarii. 2014, 35(6): 814-821 https://doi.org/10.3969/j.issn.1000-1093.2014.06.010

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