A combined numerical and theoretical study on the penetration of a jacketed rod into semi-infinite targets
A combined numerical and theoretical study on the penetration of a jacketed rod into semi-infinite targets
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夹套杆侵彻半无限目标的数值与理论结合研究
DOI：
10.1016/j.ijimpeng.2011.07.001
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发表时间：
2011-12
影响因子：
5.1
通讯作者：
中科院分区：
文献类型：
--
作者：
本文采用数值和理论相结合的方法研究了不同rj_0/rc_0比值的夹套杆对半无限靶的侵彻问题，其中rj_0和rc_0分别为夹套和芯部的半径。数值结果表明，当rj_0/rc_0较小时，与相同弹芯材料的整体长杆侵彻体相比，u-v关系变化不大，因此，整体（均质）长杆侵彻体的u-v关系也适用于夹套杆侵彻体。利用质量守恒、动量守恒和能量守恒定律，结合单位（均质）长杆侵彻的u-v关系，建立了夹套长杆侵彻半无限靶的成坑模型，并给出了夹套长杆共烧蚀半无限靶的侵彻深度预测解析模型。提出了一种新的双烧蚀向共烧蚀转变的判据。结果表明，该模型与EN 24钢套钨合金长杆侵彻半无限厚装甲钢靶的实验结果在弹坑直径和侵彻深度方面吻合较好。
A combined numerical and theoretical study is conducted herein on the penetration of semi-infinite targets by jacketed rods with different rj0/rc0ratios where rj0and rc0are the radii of the jacket and the core, respectively. The numerical results show that for smaller rj0/rc0ratios the u–v relationship changes only a little compared to that of unitary long rod penetrator of the same core material, hence, the u–v relationship of unitary (homogeneous) long rod penetration is also applicable for jacketed rod penetration. Model for cratering in semi-infinite targets by jacketed rods is then suggested by using the laws of conversation of mass, momentum and energy, together with the u–v relationship of unitary (homogeneous) long rod penetration and an analytical model for predicting the depth of penetration has also been given for jacketed long rods penetrating semi-infinite targets in co-erosion mode. A new criterion for transition from bi-erosion to co-erosion is proposed. It transpires that the present model is in good agreement with the experimental observations for EN24 steel jacketed tungsten alloy long rods penetrating semi-infinite armor steel targets in terms of crater diameter and penetration depth.
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影响因子：
5.1
作者：
Minhyung Lee
通讯作者：
Minhyung Lee
DOI：
10.2307/3611266
发表时间：
1950
期刊：
--
影响因子：
--
作者：
R. Hill
通讯作者：
R. Hill
DOI：
10.1016/0022-5096(80)90019-8
发表时间：
1980-01-01
影响因子：
5.3
作者：
HILL, R
通讯作者：
HILL, R
影响因子：
2.6
作者：
LUK, VK;FORRESTAL, MJ;AMOS, DE
通讯作者：
AMOS, DE
影响因子：
5.1
作者：
H. Lehr;E. Wollman;G. Koerber
通讯作者：
H. Lehr;E. Wollman;G. Koerber