一种异形弹撞击2A12铝合金薄靶的数值研究  

Numerical Study on the Thin 2A12 Aluminum Alloy Target Against a Modified Projectile

作　　者：贾宝惠[1] 李剑峰[1] 邓云飞[1] JIA Bao-hui;LI Jian-feng;DENG Yun-fei(College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《机械设计与制造》2018年第4期72-75,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金委员会资助项目(U1233107);工信部十三五计划(2015SACSC-044JS)

摘　　要：利用有限元软件ABAQUS建立仿真模型,构造了一种异形弹撞击2mm厚度2A12铝合金靶体,获得靶体结构剩余速度和弹道极限速度,得到靶体撞击后的损伤情况。根据仿真结果,分析异形弹的扩孔比和前探比对靶板失效模式以及抗侵彻性能的影响。研究结果表明,弹体的弹道极限会随着扩孔比的增加而越低,同时对弹靶撞击的物理过程和损伤形式进行分析发现,靶体失效模式也会受到弹体的扩孔比和前探比的影响,不同扩孔比的靶体受撞击后会出现不同的裂纹扩展和碎片分布。A series of modified projectiles impacting 2A12 aluminum alloy targets with 2mm thickness were simulated with the help of finite element code ABAQUS,after then,apart from the damage condition,the residual velocity and the ballistic limit of target were obtained.Based on simulation results,the effect of expansion ratio and probe ratio of modified projectile on the failure mode and resistance property of target was studied.The results indicate that with the increasing of expansion ratio,the ballistic limit tends to lower and lower.Furthermore the analysis about the physical process and damage form of projectile and target during impacting illustrates that the failure mode of target would be affected by expansion ratio and probe ratio of projectile too,different cracks and fragments would happen if the expansion ratios of targets are different.

关 键 词：异形弹 前探比 扩孔比 撞击 

分 类 号：TH16[机械工程—机械制造及自动化] O347O385[理学—固体力学]