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兵工学报 ›› 2021, Vol. 42 ›› Issue (9): 1809-1818.doi: 10.3969/j.issn.1000-1093.2021.09.001

• 论文 • 上一篇    下一篇

动能弹高速侵彻钢筋混凝土靶时弹丸头部质量侵蚀微观机理

宁建国, 李钊, 马天宝, 许香照   

  1. (北京理工大学 爆炸科学与技术国家重点实验室, 北京 100081)
  • 上线日期:2021-10-20
  • 作者简介:宁建国(1963—),男,教授,博士生导师。E-mail: jgning@bit.edu.cn
  • 基金资助:
    中国博士后科学基金项目(2020T130057);国家自然科学基金项目(11902036)

Microscopic Observation Mechanism of Nose Mass Abrasion of Kinetic Energy Projectile Penetrating into Reinforced ConcreteTarget at High Speed

NING Jianguo, LI Zhao, MA Tianbao, XU Xiangzhao   

  1. (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)
  • Online:2021-10-20

摘要: 动能弹在高速侵彻混凝土过程中会发生明显的质量侵蚀现象,并因此严重影响其侵彻性能。为进一步研究弹体在侵彻过程中发生侵蚀现象的内在机理,开展多组弹体高速侵彻钢筋混凝土靶的侵彻实验。采取线切割技术方法,用回收的剩余弹体头部制备微观观测实验试样。通过金相显微镜和扫描电子显微镜对剩余弹体表面多个观测点的微观形貌进行系统观测。结果表明:剩余弹体表面存在一层明显的热影响区;弹体表面材料存在大量相互平行的长距离犁沟;在弹体尖端观测到少量微裂纹,对弹体尖端的质量损失有一定贡献但影响范围有限;弹体侵蚀现象并非单一机制造成,而是一个多机制共同作用、相互影响的复杂过程。

关键词: 动能弹, 高速侵彻, 质量侵蚀, 钢筋混凝土, 微观分析

Abstract: An obvious mass abrasion of kinetic energy projectile is generated in the process of high-speed penetration into concrete target. The mass abrasion seriously affects the penetration performance of projectile. A series of high-speed penetration experiments were carried out to further study the internal mechanism of projectile abrasion during penetration. The specimens for microscopic observation were prepared from the nose of residual projectile by linear cutting technique. The microstructures at multiple observation points on the surface of residual projectile were systematically observed by metallographic microscope and scanning electron microscope. The results show that there is an obvious heat affected zone on the surface of residual projectile,and there are many long grooves parallel to each other on its surface. In addition,a few microcracks are observed at the tip of projectile nose,which contribute to the mass loss of the tip of projectile nose,but have little influence. Through the microscopic observation,it is found that the mass abrasion of projectile is not caused by a single mechanism,but is a complex process of different mechanisms interacting with each other.

Key words: kineticenergyprojectile, high-speedpenetration, massabrasion, reinforcedconcrete, microscopicanalysis

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