학술논문
上下非对称结构弹体侵彻金属薄板的特性及薄板破坏形式 / Penetration Characteristics and Plate Failure Modes of Asymmetrically Shaped Projectiles Penetrating Thin Metal Targets
Document Type
Academic Journal
Author
Source
兵工学报 / Acta Armamentarii. 44(12):3836-3850
Subject
Language
Chinese
ISSN
1000-1093
Abstract
为支撑超高声速导弹终点毁伤理论设计,适应异型弹体穿甲力学基础理论发展需求,非对称异型弹体贯穿金属薄板的穿甲特性及靶板损伤机理是当前亟需解决的关键科学问题.开展上下非对称结构异型弹体正/斜贯穿多层间隔 921A 薄钢板实验,基于 Abaqus/Explicit、VUMAT 和Python子程序开展数值模拟研究,分析弹体速度变化及偏转特性,结合靶板破坏形貌和能量耗散分析靶板损伤机理,讨论了研究结果在实际工程应用中的适用性.研究结果表明:上下非对称结构异型弹体具有维持弹体姿态稳定的特点,初速低于 600 m/s时速度降和弹道极限随倾角的增加而增大,靶板破坏模式以剪切冲塞、瓣裂和整体横向变形主导,初速高于 600 m/s时同初始倾角的弹道极限曲线重合,无量纲速度降随初速增加而降低,靶板破坏模式向延性扩孔、瓣裂和破碎转变;靶板塑性变形时切向塑性功占比最大、环向塑性功最小、轴向和径向塑性功相近,高速侵彻过程中靶板碎片动能为塑性功的25%～50%;基于几何相似的缩比模型可反映原型弹体高速穿甲时的速度变化情况及靶板的毁伤特性;研究成果可为异型弹体高速穿甲的弹靶响应及阻力特性的理论建模提供物理认识及数据支撑.
In order to support the theoretical design of terminal damage of hypersonic missile and the basic theory of armor-piercing mechanics of special-shaped projectile,the penetration ability of asymmetrically shaped projectile penetrating metal target and the damage mechanism of target plate need to be solved.The velocity variation and deflection characteristics of the projectile are analyzed through the experiment of asymmetrically shaped projectile penetrating the multi-layer spaced 921A steel plate and the numerical simulation based on Abaqus/Explicit,VUMAT and Python subroutines.The damage mechanism of target plate is analyzed from damage morphology and energy dissipation,and the applicability of the research results in practical engineering application is discussed.The results show that the asymmetric structure has the ability to maintain the stability of projectile attitude.When the initial velocity is lower than 600 m/s,the velocity drop and the ballistic limit increase with the increase of the oblique angle,and the failure modes of the target plate are shear plugging,pealing and transverse deformation.When the initial velocity is higher than 600 m/s,the ballistic limit curves of different oblique angles overlap,the dimensionless velocity drop decreases with the increase of the initial velocity,and the failure mode of target plate changes to ductile enlargement,pealing and fragmentation.During the penetration progress,the tangential component of plastic work done has the largest proportion,the circumferential component is the smallest,and the axial and radial plastic works are similar.During the high-speed penetration,the kinetic energy of plate fragments is 25%-50%of the plastic work done.The scaled model based on geometric similarity can reflect the speed change of the prototype projectile during the high-speed penetration and the damage characteristics of trget plate.
In order to support the theoretical design of terminal damage of hypersonic missile and the basic theory of armor-piercing mechanics of special-shaped projectile,the penetration ability of asymmetrically shaped projectile penetrating metal target and the damage mechanism of target plate need to be solved.The velocity variation and deflection characteristics of the projectile are analyzed through the experiment of asymmetrically shaped projectile penetrating the multi-layer spaced 921A steel plate and the numerical simulation based on Abaqus/Explicit,VUMAT and Python subroutines.The damage mechanism of target plate is analyzed from damage morphology and energy dissipation,and the applicability of the research results in practical engineering application is discussed.The results show that the asymmetric structure has the ability to maintain the stability of projectile attitude.When the initial velocity is lower than 600 m/s,the velocity drop and the ballistic limit increase with the increase of the oblique angle,and the failure modes of the target plate are shear plugging,pealing and transverse deformation.When the initial velocity is higher than 600 m/s,the ballistic limit curves of different oblique angles overlap,the dimensionless velocity drop decreases with the increase of the initial velocity,and the failure mode of target plate changes to ductile enlargement,pealing and fragmentation.During the penetration progress,the tangential component of plastic work done has the largest proportion,the circumferential component is the smallest,and the axial and radial plastic works are similar.During the high-speed penetration,the kinetic energy of plate fragments is 25%-50%of the plastic work done.The scaled model based on geometric similarity can reflect the speed change of the prototype projectile during the high-speed penetration and the damage characteristics of trget plate.