Zr_(77.1)Cu_(13)Ni_(9.9)非晶合金破片侵彻LY12铝合金及TC4钛合金靶板毁伤后效及机理对比研究  

Damage Effect and Mechanism of Zr_(77.1)Cu_(13)Ni_(9.9) Bulk Metallic Glasses Fragment Penetrating LY12 Aluminum Alloy and TC4 Titanium Alloy Target Plate

作　　者：杨林 于述贤[1,2] 范群波 YANG Lin;YU Shuxian;FAN Qunbo(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials Under Shock and Impact,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]北京理工大学冲击环境材料技术国家级重点实验室,北京100081

出　　处：《北京理工大学学报》2023年第4期417-428,共12页Transactions of Beijing Institute of Technology

基　　金：重庆市自然科学基金资助项目(cstc2020icyj-msxmX0094)。

摘　　要：锆基非晶合金是极具发展潜力的含能结构材料,由其制备的破片侵彻不同材质装甲时,会表现出显著不同的毁伤效果.本研究中利用弹道枪发射装置,针对Zr_(77.1)Cu_(13)Ni_(9.9)非晶合金破片,以1200 m/s速度分别侵彻8 mm厚LY12铝合金和TC4钛合金屏蔽靶,结合高速摄影技术比较了破片碎裂形成碎片云并造成毁伤后效的过程;同时基于FEM/SPH自适应耦合法,再现了破片对两类屏蔽靶开坑、稳定侵彻、穿透等系列阶段,以及碎片云形成的复杂物理过程,揭示了其对后效靶的毁伤机理.结果表明,由于TC4钛合金相比LY12铝合金具有更高的强度,穿透TC4屏蔽靶所需的时间更长,且靶板内最大等效应力是后者的3倍左右;破片在侵彻TC4屏蔽靶时与靶板间发生了更强的相互作用,使得破片前端出现更大面积的高应变区域,由此导致破片发生了更严重的破碎并产生分布范围更大的碎片云,从而在后效靶上产生更大面积的损伤.Zr-based bulk metallic glass is an energetic structural material with great development potential,its fragments show significantly different damage effects when the warhead penetrates different alloy armors.In this study,Zr_(77.1)Cu_(13)Ni_(9.9) bulk metallic fragments were fired by a ballistic rifle at a speed of 1200 m/s to penetrate 8 mm thick LY12 aluminum alloy and TC4 titanium alloy shielding targets,respectively.The process of the fragment cloud formation and its damage was captured based on high-speed photography technology.Meanwhile,in order to reveal the damage mechanism to the witness targets,based on finite element method(FEM)/smoothed particle hydrodynamics(SPH)adaptive coupling method,a series of penetrating stages was simulated,such as the cratering,the quasi-steady penetration,and the end of penetration,as well as the complex physical process of fragment cloud formation.The results show that due to the higher strength of the TC4 titanium alloy compared to that of the LY12 aluminum alloy,it takes longer for the fragments to penetrate the TC4 shielding target,and the maximum equivalent stress in the TC4 target plate is about three times larger than that in the LY12 plate.For the TC4 target plate,simulations prove that a stronger interaction occurs between the fragment and the target plate,resulting in a larger high strain area at the front of the fragment,hence,severer fragmentation and more dis-persed fragment cloud are generated,causing larger damaging area on the witness target.

关 键 词：ZR基非晶合金 结构释能破片 FEM/SPH耦合方法 数值模拟 毁伤后效 

分 类 号：O385[理学—流体力学]