多孔钛合金夹芯层陶瓷/UHMWPE复合结构的抗侵彻性能  

Penetration resistance of ceramic/UHMWPE composite structures with porous titanium alloy sandwich layer

作　　者：马铭辉 武一丁 王晓东 余毅磊 王伯通 高光发[1] MA Minghui;WU Yiding;WANG Xiaodong;YU Yilei;WANG Botong;GAO Guangfa(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《爆炸与冲击》2024年第4期1-14,共14页Explosion and Shock Waves

基　　金：国家自然科学基金(U2341244,12172179,11772160)。

摘　　要：陶瓷/纤维复合装甲的纤维背板由于其刚度较低,无法为陶瓷面板提供足够的支撑,削弱了陶瓷面板对弹丸的侵蚀作用。为了增强复合装甲的整体结构刚度,在陶瓷/纤维复合装甲中加入了金属夹芯层材料,通过试验和数值模拟研究了夹芯复合装甲对12.7 mm穿燃弹的抗弹性能。试验结果表明,穿燃弹弹芯表现出脆性断裂的失效模式,复合材料装甲表现出多种失效模式,包括夹芯层的花瓣形扩孔,UHMWPE(ultra-high molecular weight polyethylene)层压板的分层和凸起变形。建立了三维数值模型来分析整个弹道响应的演变,通过试验结果验证了模拟的准确性。模拟结果表明,12.7 mm穿燃弹的被甲会对陶瓷造成损伤,同时陶瓷会侵蚀弹芯的尖卵形头部,使弹芯头部变钝从而削弱弹芯对UHMWPE背板的侵彻能力。残余弹体的动能大部分由UHMWPE层吸收,UHMWPE层压板的失效模式会随着层数的增加由剪切失效转变为拉伸失效占主导地位。此外,作为夹芯层的多孔TC4板能够为陶瓷面板提供支撑,提高陶瓷面板的吸能效果以及弹体的侵蚀作用,并且12 mm孔径的TC4夹芯层能够提供更大的刚度支撑,使整体复合结构的吸能效率提升10%。The fiber back plate in ceramic/fiber composite armor cannot provide sufficient support for the ceramic panel due to its low stiffness,which weakens the erosion effect of the ceramic panel on the projectile.In order to enhance the overall structural stiffness of composite armor,a metal sandwich layer material was added to the ceramic/fiber composite armor.The ballistic performance of the sandwich composite armor against 12.7-mm incendiary projectiles was studied through experiments and numerical simulations.The experimental results indicate that the core of the penetrator exhibits a brittle fracture failure mode,while composite armor exhibits multiple failure modes,including petal-shaped expansion of the sandwich layer,delamination and protrusion deformation of the UHMWPE(ultra-high molecular weight polyethylene)laminate.A three-dimensional numerical model was established to analyze the evolution of the entire ballistic response,and the accuracy of the simulation was verified through experimental results.The simulation results indicate that the armor of the 12.7-mm penetrator will cause damage to the ceramic,which will erode the pointed oval head of the projectile core,making the core head blunt and weakening the penetration ability of the projectile core into the UHMWPE backing plate.Most of the kinetic energy of the residual projectile is absorbed by the UHMWPE layer,and the failure mode of the UHMWPE laminate will change from shear failure to tensile failure as the number of layers increases.In addition,as a sandwich layer,the porous TC4 board can provide support for the ceramic panel,increase the energy absorption of the ceramic panel and erosion of the projectile,and the 12-mm-pore-size TC4 sandwich layer can provide greater stiffness support,increase the energy absorption efficiency of the overall composite structure by 10%.

关 键 词：陶瓷复合装甲 多孔夹芯层 UHMWPE 12.7 mm穿燃弹 

分 类 号：O383[理学—流体力学]