Abstract
In this study, ogive-nose projectile penetration into concrete slabs was tested at initial projectile impact velocities ranging from 1325.0 m/s to 1425.0 m/s. The depth of penetration and mass loss of the projectiles were measured, and the residual projectiles were recovered after the penetration tests. Scanning electron microscopy and metallographic microscopy of the microstructures were performed on various sections and outer surfaces of the projectiles taken from different locations of the residual projectiles, to analyze the intrinsic mechanisms of mass abrasion. The analysis results reveal that, during high-speed projectile penetration, projectile abrasion is caused by multiple mechanisms. Based on the cavity expansion theory, a projectile penetration model was established by considering the two main mass loss mechanisms observed in the microscopic tests. The theoretical predictions of the penetration depth, mass loss rate, and change of projectile head are consistent with the experimental results obtained both in this study and previous research.
摘要
本文开展了初始撞击速度为1325.0 m/s∼1425.0 m/s范围内的卵形弹体侵彻混凝土试验. 获取了弹体的侵彻深度及质量损失 等试验数据, 并对侵彻试验后的剩余弹体进行了回收. 通过对剩余弹体不同部位切片和外表面的微观观测, 分析了弹体质量侵蚀的 内在机理. 结果表明, 卵形弹体高速侵彻混凝土过程中的质量侵蚀现象是多种机制耦合造成的. 基于空腔膨胀理论和微观试验中观 测得到的两种主要侵蚀机理, 建立了计及质量侵蚀的弹体侵彻理论模型. 理论模型预测的弹体侵彻深度、质量损失率和弹头形状 变化与本文试验及前人试验结果吻合较好.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant No. 12032006) and Beijing Institute of Technology Research Fund Program for Young Scholars (Grant No. XSQD-202102011).
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Jianguo Ning designed the research. Zhao Li and Xiangzhao Xu wrote the first draft of the manuscript. Zhao Li and Xiangzhao Xu set up the experiment set-up and processed the experiment data. Huilan Ren and Xiangzhao Xu helped organize the manuscript. Jianguo Ning, Huilan Ren, Zhao Li and Xiangzhao Xu revised and edited the final version.
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Ning, J., Ren, H., Li, Z. et al. A mass abrasion model with the melting and cutting mechanisms during high-speed projectile penetration into concrete slabs. Acta Mech. Sin. 38, 121597 (2022). https://doi.org/10.1007/s10409-022-21597-x
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DOI: https://doi.org/10.1007/s10409-022-21597-x