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兵工学报 ›› 2017, Vol. 38 ›› Issue (10): 1933-1941.doi: 10.3969/j.issn.1000-1093.2017.10.008

• 论文 • 上一篇    下一篇

高应变率下金属柱壳动态变形及形成破片特性研究

朱建军1, 李伟兵1, 李文彬1, 王晓鸣1, 郑宇1, 卢海涛2,3, 袁书强4   

  1. (1.南京理工大学 智能弹药技术国防重点学科实验室, 江苏 南京 210094; 2.瞬态冲击技术重点实验室, 北京 102202; 3.中国兵器工业第208研究所, 北京 102202;4.中国兵器科学研究院宁波分院, 浙江 宁波 315103)
  • 收稿日期:2017-01-15 修回日期:2017-01-15 上线日期:2017-11-22
  • 作者简介:朱建军(1993—),男,博士研究生。E-mail: zhujianjun0527@163.com

Dynamic Deformation and Fracture Fragmentation Behavior of Metal Cylindrical Shell at High Strain Rates

ZHU Jian-jun1, LI Wei-bing1, LI Wen-bin1, WANG Xiao-ming1, ZHENG Yu1, LU Hai-tao2,3, YUAN Shu-qiang4   

  1. (Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.Science and Technology on Transient Impact Laboratory, Beijing 102202, China; 3.No.208 Research Institute of China Ordnance Industries, Beijing 102202, China;4.Ningbo Branch of China Ordnance Science Institute, Ningbo 315103, Zhejiang, China)
  • Received:2017-01-15 Revised:2017-01-15 Online:2017-11-22

摘要: 针对高应变率下金属柱壳动态变形及断裂响应问题,以50SiMnVB钢和40CrMnSiB钢壳体材料为研究对象,应用超高速摄影技术以及Autodyn数值模拟软件研究了壳体在高应变率下的动态变形过程。获得了壳体外壁自由面径向位移以及速度变化规律,并对回收所得破片的尺度分布规律以及断裂特性进行了分析。结果表明:壳体内部裂纹贯穿整个壁厚发生在20~25 μs之间;40CrMnSiB钢壳体达到的稳定速度比50SiMnVB钢壳体提高了8.1%;试验回收所得壳体环向方向断裂形成的破片宽度变化呈正态分布,且40CrMnSiB钢壳体形成的破片质量在0.1 g以上数目比50SiMnVB钢壳体增加了49%,破碎程度更加严重。

关键词: 兵器科学与技术, 动态变形, 膨胀断裂, 稀疏波, 破片质量分布, 高应变率

Abstract: To understand the complex dynamic response of deformation and fracture of metal cylindrical shell at high-strain rates loading, the cylinder shells fabricated from 50SiMnVB steel and 40CrMnSiB steel were selected as the objects for study. The ultra-high speed photographic technology and AUTODYN-2D finite element software are applied to research the dynamic deformation of shell at high strain-rates, which obtaine the variation of radial displacement and velocities of outer-wall from the shell, and the fragment mass distribution and fracture fragmentation behavior of the resulting fracture fragments are analyzed. The results reveal that the phase of cracks penetrating the entire casing wall thickness occurs within the time range of 20-25 μs, and the velocity of 40CrMnSiB steel shell is increased by 8.1%, compared with that of 50SiMnVB steel shell. Moreover, the distribution of fragments width is of Gaussian-distribution, the fragmentation degree of fragments formed by 40CrMnSiB steel shell is more serious, and the number of fragments with mass of more than 0.1 g is increased by 49% compared with that of 50SiMnVB steel shell. Key

Key words: ordnancescienceandtechnology, dynamicdeformation, expansionandfracture, rarefactionwave, fragmentmassdistribution, highstrain-rate

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