An analytical approach for modelling hypervelocity impact by long rod

IF 1.9 4区 工程技术 Q3 MECHANICS
Hyo-Song Kim , Kumchol Yun , Yong-Nam Pak , Chang-Hyon Choe
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引用次数: 0

Abstract

Hydrodynamic theory of hypervelocity penetration is widely used to describe the penetration of long rods because of its simplicity and computational efficiency. In this paper, the penetration resistance is evaluated from the crater size generated by hypervelocity impact and is combined with one-dimensional analytical model to predict DOP (depth of penetration). Then, a computational formulation for change of energy per unit DOP is derived and the influences of different parameters on DOP are analysed. At last, in the multi-layer target, the effect of the layer arrangement is considered from the energetic point of view. The method for determining the effective arrangement of material layers with maximum energy variation is proposed. The validity of our approach is confirmed by comparing our analytical results with the AUTODYN results and literature.

模拟长杆超高速撞击的分析方法
超高速穿透的流体力学理论因其简单和计算效率高而被广泛用于描述长杆的穿透。本文根据超高速撞击产生的凹坑大小来评估穿透阻力,并结合一维分析模型来预测穿透深度(DOP)。然后,推导出单位 DOP 能量变化的计算公式,并分析了不同参数对 DOP 的影响。最后,在多层目标中,从能量角度考虑了层排列的影响。提出了确定能量变化最大的材料层有效排列的方法。通过将我们的分析结果与 AUTODYN 结果和文献进行比较,证实了我们方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.10
自引率
4.20%
发文量
114
审稿时长
9 months
期刊介绍: Mechanics Research Communications publishes, as rapidly as possible, peer-reviewed manuscripts of high standards but restricted length. It aims to provide: • a fast means of communication • an exchange of ideas among workers in mechanics • an effective method of bringing new results quickly to the public • an informal vehicle for the discussion • of ideas that may still be in the formative stages The field of Mechanics will be understood to encompass the behavior of continua, fluids, solids, particles and their mixtures. Submissions must contain a strong, novel contribution to the field of mechanics, and ideally should be focused on current issues in the field involving theoretical, experimental and/or applied research, preferably within the broad expertise encompassed by the Board of Associate Editors. Deviations from these areas should be discussed in advance with the Editor-in-Chief.
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