Long-rod penetration: the transition zone between rigid and hydrodynamic penetration modes

被引:13
|
作者
Lou, Jian-feng [1 ]
Zhang, Yan-geng [1 ]
Wang, Zheng [1 ]
Hong, Tao [1 ]
Zhang, Xiao-li [1 ]
Zhang, Shu-dao [1 ]
机构
[1] Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China
来源
DEFENCE TECHNOLOGY | 2014年 / 10卷 / 02期
基金
中国国家自然科学基金;
关键词
Penetration; Theoretical analysis model; Transition zone; Threshold velocity; Long rod;
D O I
10.1016/j.dt.2014.05.007
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Long-rod penetration in a wide range of velocity means that the initial impact velocity varies in a range from tens of meters per second to several kilometers per second. The long rods maintain rigid state when the impact velocity is low, the nose of rod deforms and even is blunted when the velocity gets higher, and the nose erodes and fails to lead to the consumption of long projectile when the velocity is very high due to instantaneous high pressure. That is, from low velocity to high velocity, the projectile undergoes rigid rods, deforming non-erosive rods, and erosive rods. Because of the complicated changes of the projectile, no well-established theoretical model and numerical simulation have been used to study the transition zone. Based on the analysis of penetration behavior in the transition zone, a phenomenological model to describe target resistance and a formula to calculate penetration depth in transition zone are proposed, and a method to obtain the boundary velocity of transition zone is determined. A combined theoretical analysis model for three response regions is built by analyzing the characteristics in these regions. The penetration depth predicted by this combined model is in good agreement with experimental result. Copyright (C) 2014, China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved.
引用
收藏
页码:239 / 244
页数:6
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