Impact Analysis of SiC-based Composites Subjected to an Armor Piercing Projectile

碳化矽基複合材料承受穿甲彈衝擊分析

陳幼良(Yu-Liang Chen) ； 張閔森(Min-Sen Chang) ； 沈柏成(Bor-Cherng Shen) ； 林明諭(Ming-Yu Lin) ； 劉上誠(Shang-Cheng Liu) ； 陳一忠(Yi-Zhong Chen) ； 劉哲原(Che-Yuan Liu)

《中正嶺學報》 49卷2期 (2020/11) Pp. 1-10

https://doi.org/10.30188/JCCIT.202011_49(2).0001

摘要

In this study, the anti-armor-piercing capability of silicon carbide (SiC) based composite armor combined with a metal backing subjected to impact by an armor-piercing fin-stabilized discarding sabot (APFSDS) was studied. 4340 steel with a thickness of 100 mm was used as the back plate. The external armor, measuring 310-mm long and 150-mm wide, was made of ceramics covered with tough materials (fiber/metal). The total thickness of the outer armor was either 32 mm or 43 mm. Outer armor with a total thickness of 32 mm contained 18 mm of ceramic material, and 43-mm-thick armor contained 22 mm of ceramic material. Each had a different thickness of Kevlar and was coated with a 4340 steel thin plate. The tungsten core of the US NM225 APFSDS, measuring 30 mm × 173 mm, provided impact in the simulation model. Four incident angles were used, all with an impact velocity of 1360 m/s, to perform the numerical simulation and analysis. The results were compared with those for pure SiC and Al_2O_3. All models used ANSYS/LS-DYNA to execute the dynamic numerical simulation. The ceramic model in the finite element code is described by the JH-2 model conforming to ceramic brittleness. The residual average velocity, residual kinetic energy, and stress transformation of the projectile were obtained through simulation. Of all the specimens, the SiC-based composite exhibited the best bullet-resistant capability.

關鍵字

Silicon carbide based composite armor ； APFSDS ； LS-DYNA

並列摘要

本研究以碳化矽基（SiC）複合材料結合金屬背板之複合裝甲抗翼穩脫殼穿甲彈衝擊性能為研究方向。該金屬背板驗證靶厚度為100 mm的4340鋼板，外掛式裝甲尺寸為長310 mm、寬150 mm，由陶瓷包覆韌性材料（纖維／金屬）組合而成。外掛裝甲總厚度分別為32 mm及43 mm，總厚度32 mm內含18 mm的陶瓷材料，總厚度43 mm內含22 mm的陶瓷材料，各搭配不同厚度的Kevlar並以4340鋼板包覆。彈體以美軍NM225 30 mm x 173 mm翼穩脫殼穿甲彈（APFSDS）鎢質內芯為原型，以具有速度1360 m/s搭配4種不同入射角度撞擊靶體，實施數值模擬並分析。所得結果與純碳化矽（SiC）及氧化鋁（Al_2O_3）做比較。上述模型均運用ANSYS/LS-DYNA軟體進行動態數值模擬分析，在有限元素軟體內的陶瓷模型以符合陶瓷脆性的JH-2模型描述。由模擬軟體分析彈體殘餘平均速度、殘餘動能、應力傳遞方式等。結果證明所有的實驗組合理，以碳化矽基（SiC）複合材料表現出最佳的抗彈性能。

並列關鍵字

碳化矽基複合裝甲 ； 翼穩脫殼穿甲彈 ； LS-DYNA