Wang Yan, Liu Jinxu, Liu Xingwei, Feng Xinya, Du Yifan, Cao Jie
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
China National Key Laboratory of Science and Technology on Materials Under Shock and Impact, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel). 2025 Jun 11;18(12):2742. doi: 10.3390/ma18122742.
The metallic shaped charge liner (SCL) is widely utilized in the defense industry, oil perforation, cutting, and other industrial fields due to the powerful penetration performance. However, quantitative law and underlying mechanisms of material properties affecting SCL penetration performance are unclear. Based on the real and virtual material properties, by combining numerical simulation with machine learning, the influence of material properties on SCL penetration performance was systematically studied. The findings in the present work provided new insights into the penetration mechanism and corresponding influencing factors of the metal jet. It indicated that penetration depth was dominated by the melting point, specific heat, and density of the SCL materials rather than the conventionally perceived plasticity and sound velocity. Average perforation diameter was dominated by the density and plasticity of the SCL materials. Particularly, the temperature rise and thermal softening effect of the SCL controlled by the melting point and specific heat have a significant effect on the "self-consumption" of the metal jet and further on the penetration ability. Additionally, the density of the SCL influences the penetration depth deeply via dynamic pressure of the jet, but the influence of density on penetration depth decreases with the increase in density. The correlation between the key properties and penetration performance was obtained according to a quadratic polynomial regression algorithm, by which the penetration potential of SCL materials can be quantitatively evaluated. Overall, the present study provides a new SCL material evaluation and design method, which can help to expand the traditional penetration regime of the SCL in terms of the penetration depth and perforation and is expected to be used for overcoming the pierced and lateral enhancement trade-off.
金属聚能装药药型罩（SCL）因其强大的侵彻性能而广泛应用于国防工业、石油射孔、切割等工业领域。然而，材料性能影响SCL侵彻性能的定量规律和潜在机制尚不清楚。基于真实和虚拟材料性能，通过数值模拟与机器学习相结合，系统研究了材料性能对SCL侵彻性能的影响。本工作的研究结果为金属射流的侵彻机理及相应影响因素提供了新的见解。结果表明，侵彻深度主要由SCL材料的熔点、比热容和密度决定，而非传统认知中的塑性和声速。平均穿孔直径主要由SCL材料的密度和塑性决定。特别地，由熔点和比热容控制的SCL的温度升高和热软化效应，对金属射流的“自耗”进而对侵彻能力有显著影响。此外，SCL的密度通过射流的动压对侵彻深度有深刻影响，但密度对侵彻深度的影响随密度增加而减小。根据二次多项式回归算法得到了关键性能与侵彻性能之间的相关性，据此可定量评估SCL材料的侵彻潜力。总体而言，本研究提供了一种新的SCL材料评估和设计方法，有助于在侵彻深度和穿孔方面扩展SCL的传统侵彻范围，有望用于克服穿孔与侧向增强之间的权衡。
