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兵工学报 ›› 2019, Vol. 40 ›› Issue (10): 2032-2041.doi: 10.3969/j.issn.1000-1093.2019.10.008

• 论文 • 上一篇    下一篇

不同弹形撞击下泡沫铝夹芯结构动力学性能研究

郭亚周1, 刘小川1, 何思渊2, 王计真1, 杨海1   

  1. (1.中国飞机强度研究所 结构冲击动力学航空科技重点试验室, 陕西 西安 710065;2.东南大学 生物科学与医学工程学院, 江苏 南京 211189)
  • 收稿日期:2018-12-19 修回日期:2018-12-19 上线日期:2019-12-18
  • 作者简介:郭亚周(1994—),男,助理工程师,硕士。E-mail: guoyazhoul23@163.com
  • 基金资助:
    国家自然科学基金项目(11572087); 陕西省青年科技新星项目(2018KJXX-052)

Research on Dynamic Properties of Aluminum Foam Sandwich Structure Impacted by Projectiles with Different Shapes

GUO Yazhou1, LIU Xiaochuan1, HE Siyuan2, WANG Jizhen1, YANG Hai1   

  1. (1.Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics, Aircraft Strength Research Institute of China, Xi'an 710065, Shaanxi, China;2.School of Biological Science & Medical Engineering, Southeast University, Nanjing 211189, Jiangsu, China)
  • Received:2018-12-19 Revised:2018-12-19 Online:2019-12-18

摘要: 为研究不同弹形撞击下泡沫铝夹芯结构的动力学性能,通过空气炮发射方式分别开展了球形弹、锥头弹和平头弹撞击泡沫铝夹芯板试验。基于非线性动力有限元软件LS-DYNA进行了不同弹形撞击泡沫铝夹芯板的数值仿真,分析了不同弹形、不同速度对夹芯板吸能特性的影响。试验结果与仿真结果一致性较好,结果表明:锥头弹撞击变形模式与球头弹撞击变形模式基本相同,平头弹侵彻过程中产生较严重的冲塞破坏,前面板和后面板呈现撕裂破坏模式,侵彻后夹芯被压实部分泡沫铝粘接在后面板上;锥形弹头部尖锐,弹头与靶的接触区域小、侵彻力大,平头弹的弹头和靶的接触区域大、侵彻力小,但靶面破坏区域大且撞击后效更大,球头弹则居于二者之间;当速度较低时,改善前面板和夹芯板的厚度以及材料性能可以较好地提升泡沫铝夹芯板的性能;当速度较高时,后面板吸能比例逐渐增大,重点改善后面板的厚度和材料性能可以较好地改善夹芯板抗侵彻性能。

关键词: 泡沫铝夹芯板, 弹形, 撞击, 变形模式, 抗侵彻试验

Abstract: The experiments of impacting the aluminum foam sandwich panels by spherical, pointed and flat nose projectiles launched from gas gun were carried to study the dynamic properties of aluminum foam sandwich structure. Based on LS-DYNA software, the impacts of different projectiles on aluminum foam sandwich panels are simulated, and the influences of different projectile shapes and speed on the energy absorption characteristics of sandwich panels are analyzed. The experimental results are well in agreement withe the simulated results. The results show that the deformation mode of pointed projectile is basically the same as that of spherical projectile, the flat nose projectile damages the sandwich panels more seriously during penetrating, the front and rear panels exhibit a tear failure mode, and the compacted aluminum foam is bonded to the rear panel after penetration. The head of pointed projectile is sharp, the contact area between the warhead and the target is small, and the penetration force is large. The contact area between the warhead of flat noise projectile and the target is large, and the penetration force is small, but the target damage area is large and the impact is more effective. The impact effect of spherical projectile is between those of pointed and flat nose projectiles: the improvement in the thicknesses and material properties of front and sandwich panels can better improve the penetration resistance of aluminum foam sandwich panel at low impact speed; the proportion of energy absorption of rear panel increases gradually, the improvement in the thickness and material properties of rear panel can improve the penetration resistance of sandwich panel at high impact speed. Key

Key words: aluminumfoamsandwichpanel, shapeofprojectile, impact, deformationmode, anti-penetrationtest

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