弹丸斜向冲击混凝土目标时的变形特性和影响因素

IF 1.4 4区 物理与天体物理 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY AIP Advances Pub Date : 2024-09-09 DOI:10.1063/5.0220438
Xiangyu Xu, Xigui Tao, Yingxiang Wu, Yunke Lu, Yan Liu, Ji Zhang, Yushuai Zhang
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引用次数: 0

摘要

弹丸在斜向撞击混凝土后会发生偏转甚至跳弹。然而,有关射弹对混凝土目标斜向冲击的研究主要集中在斜向穿透和临界跳弹角上,有关跳弹的实验研究很少。挠度及其影响因素仍未确定。本研究对斜向冲击 C60 混凝土靶的弹丸进行了实验和 LS-DYNA 数值模拟。实验研究直观地揭示了斜撞击后的偏转和跳弹现象。大角度撞击产生的跳弹可有效减小混凝土靶的破坏面积。随后,通过尺寸分析确定了影响弹丸偏转角的主要控制参数,并利用正交实验设计对这些参数进行了敏感性分析。在此基础上,进一步明确了入射角、冲击速度和弹丸长径比对弹丸偏转的影响。结果表明,当 30 毫米口径的弹丸以入射角 ∼45° 斜向撞击 C60 混凝土时,挠曲角度最大。在跳弹的情况下,偏转角随冲击速度的增加而增大,随长径比的增加而减小。这项研究有助于预测和控制弹丸挠度,并为混凝土防护结构的创新设计提供参考。
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Deflection characteristics and influencing factors of projectile oblique impact on concrete targets
The projectile deflects and even ricochets after an oblique impact on the concrete. However, research on the oblique impact of projectiles on concrete targets mainly focuses on oblique penetration and the critical ricochet angle, and there are few experimental studies on ricochets. Deflection and its influencing factors remain undefined. This study conducted experiments and LS-DYNA numerical simulations on projectiles obliquely impacting C60 concrete targets. The experimental research visually revealed deflection and ricochet phenomena after the oblique impact. The ricochet caused by large-angle impacts can effectively reduce the damaged area of concrete targets. Subsequently, the main governing parameters affecting the deflection angle of the projectile were identified through dimensional analysis, and a sensitivity analysis was performed on these parameters using an orthogonal experimental design. On this basis, the influence of the incident angle, impact velocity, and projectile length-to-diameter ratio on the projectile deflection was further clarified. The results showed that the maximum deflection angle was achieved when a 30 mm caliber projectile obliquely impacted a C60 concrete at an incident angle of ∼45°. In the case of ricochets, the deflection angle increased with an increase in the impact velocity and decreased with an increase in the length-to-diameter ratio. This study aids in predicting and controlling projectile deflection and provides a reference for the innovative design of concrete protective structures.
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来源期刊
AIP Advances
AIP Advances NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
2.80
自引率
6.20%
发文量
1233
审稿时长
2-4 weeks
期刊介绍: AIP Advances is an open access journal publishing in all areas of physical sciences—applied, theoretical, and experimental. All published articles are freely available to read, download, and share. The journal prides itself on the belief that all good science is important and relevant. Our inclusive scope and publication standards make it an essential outlet for scientists in the physical sciences. AIP Advances is a community-based journal, with a fast production cycle. The quick publication process and open-access model allows us to quickly distribute new scientific concepts. Our Editors, assisted by peer review, determine whether a manuscript is technically correct and original. After publication, the readership evaluates whether a manuscript is timely, relevant, or significant.
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