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Study on perforation of elliptical cross-section projectile into finite-thick metal targets

椭圆截面弹体贯穿有限厚金属靶特性研究

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Abstract

The model of the elliptical cross-section projectile perforating finite-thick metal targets was developed by combining with the shape function of the elliptical cross-section projectile, where the elastic-decay, plastic-decay, cracking three-stage perforation model was employed. Then, experiments of projectile perforating finite-thick aluminum alloy targets were conducted, including two kinds of elliptical cross-section projectiles and one kind of circular cross-section projectile. The striking velocity of the projectile ranged from 230 m/s to 570 m/s, in which the ballistic limit velocity (BLV) was included. The existed and current experimental results were used to validate the model and agreed well with the calculation results. Besides, the perforation performance of elliptical cross-section projectile and circular cross-section projectile was analyzed. The results showed that the two can be regarded as equivalent projectiles when the mass, head length, any cross-sectional area, and length of projectiles were equal. Next, the critical non-dimensional target thickness was clarified under the different striking factors of the projectile. Calculation results showed that the critical non-dimensional target thickness had a linear relation with the striking factor of the projectile. Furthermore, the influences of the head shape factor of elliptical cross-section projectile on perforation characteristics were studied.

摘要

本文结合弹性衰减-塑性衰减-开裂三阶段贯穿模型及椭圆截面弹体形状函数, 建立了椭圆截面弹体贯穿有限厚金属靶侵彻模型. 随后, 开展了两种椭圆截面弹体及一种圆截面弹体以230~570 m/s的撞击速度对铝合金靶板的贯穿试验, 且试验覆盖了弹道极限速度. 在此基础上, 采用本文及文献中的试验数据对模型进行了验证, 模型的计算结果与试验结果吻合较好. 此外, 对比分析了椭圆截面弹体与圆截面弹体对有限厚金属靶的贯穿特性. 结果表明, 当椭圆截面弹体与圆截面弹体的质量、 弹体头部长度、 任意弹体截面面积及弹体长度相等时, 二者可视为等效弹体. 其次, 确定了无量纲靶体临界厚度与弹体撞击因子间的关系. 计算结果表明, 无量纲靶体临界厚度与弹体撞击因子呈线性关系, 同时, 进一步分析了椭圆截面弹体头部形状因子对其贯穿特性的影响规律.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 12141202 and 12202205), and Fundamental Research Funds for the Central Universities (Grant No. 30919011401).

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Authors and Affiliations

  1. School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, China

    Haiyang Wei  (魏海洋), Junwei Liu  (刘均伟), Xianfeng Zhang  (张先锋), Chuang Liu  (刘闯) & Pengcheng Li  (李鹏程)

  2. Beijing Institute of Space Long March Vehicle, Beijing, 100074, China

    Haiyang Wei  (魏海洋) & Liang Qiao  (乔良)

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  1. Haiyang Wei  (魏海洋)
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  2. Junwei Liu  (刘均伟)
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  3. Xianfeng Zhang  (张先锋)
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  4. Chuang Liu  (刘闯)
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  5. Pengcheng Li  (李鹏程)
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  6. Liang Qiao  (乔良)
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Contributions

Xianfeng Zhang designed the research. Haiyang Wei wrote the first draft of the manuscript. Haiyang Wei and Chuang Liu set up the experiment set-up and processed the experiment data. Junwei Liu and Pengcheng Li helped organize the manuscript. Haiyang Wei and Liang Qiao revised and edited the final version.

Corresponding author

Correspondence to Xianfeng Zhang  (张先锋).

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Wei, H., Liu, J., Zhang, X. et al. Study on perforation of elliptical cross-section projectile into finite-thick metal targets. Acta Mech. Sin. 39, 422429 (2023). https://doi.org/10.1007/s10409-022-22429-x

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