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Simulation of ballistic performance of a two-layered structure of nanostructured metal and ceramic

机译：纳米结构金属和陶瓷两层结构的弹道性能模拟

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摘要

Two-layered structures, especially the metal/ceramic structure, have proved to have far better ballistic performance than a single-layered one. In this paper, a theoretical framework and numerical scheme, based on the combination of a mechanism-based strain gradient plasticity theory, micromechanics of composite model, the Johnson-Cook failure model, and the extended Drucker-Prager plasticity model, are set up to investigate a two-layered structure of nanostructured (NS) metal and ceramic. This study focuses on the different roles the two layers play during the protection process and clarifies the intrinsic significance of the ceramic layer and the metal layer according to different criteria of structural design. It is found that, in cases of targets with the same total thickness, the function of wearing and slowing down the projectile is mainly realized by the NS metal layer, while in cases of targets with a constant areal density, the function of wearing the projectile is mainly realized by the ceramic layer. Our simulations also show that, under the same impact velocity, the resistance of the target composed of the NS metal and ceramic laminates is remarkably stronger than that composed of coarse-grained metal and ceramic laminates. (C) 2016 Elsevier Ltd. All rights reserved.
机译：两层结构，尤其是金属/陶瓷结构，已被证明比单层结构具有更好的弹道性能。本文建立了基于机理的应变梯度可塑性理论，复合材料微力学模型，Johnson-Cook破坏模型和扩展的Drucker-Prager可塑性模型相结合的理论框架和数值方案。研究纳米结构（NS）金属和陶瓷的两层结构。这项研究着眼于两层在保护过程中所起的不同作用，并根据结构设计的不同标准阐明了陶瓷层和金属层的内在重要性。结果发现，在靶材总厚度相同的情况下，弹丸的磨损和减慢功能主要是通过NS金属层实现的；在面密度恒定的靶材中，弹丸的磨损和磨损功能主要由NS金属层实现。主要由陶瓷层实现。我们的模拟还表明，在相同的冲击速度下，由NS金属和陶瓷层压板组成的靶材的电阻明显强于由粗粒金属和陶瓷层压板组成的靶材。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Composite Structures》 |2016年第12期|163-173|共11页
  • 作者

    Guo X.; Sun X.; Tian X.; Weng G. J.; Ouyang Q. D.; Zhu L. L.;

  • 作者单位

    Tianjin Univ, Sch Mech Engn, Tianjin 300072, Peoples R China|Tianjin Key Lab Nonlinear Dynam & Control, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Mech Engn, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Mech Engn, Tianjin 300072, Peoples R China;

    Rutgers State Univ, Dept Mech & Aerosp Engn, New Brunswick, NJ 08903 USA;

    Tianjin Univ, Sch Mech Engn, Tianjin 300072, Peoples R China;

    Zhejiang Univ, Sch Aeronaut & Astronaut, Dept Engn Mech, Hangzhou 310027, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ballistic performance; Nanostructured metal; Helmet; Wear degree; Deformation and resistance of target;

    机译：弹道性能;纳米结构金属;头盔;磨损程度;靶的变形和阻力;

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