南京理工大学学报（自然科学版）2025，Vol.49Issue(6)：652-660,9.DOI:10.14177/j.cnki.32-1397n.2025.49.06.003
内爆载荷作用下金属柱壳轴向裂纹扩展及动态破碎性能
Axial crack propagation and dynamic fragmentation performance of metal cylindrical shells under implosion loading
摘要
Abstract
To investigate the expansion and fracture mechanism of metal cylindrical shells under implosion loading,this paper employed AUTODYN simulation software to numerically simulate the axial crack propagation process of 40CrMnSiB steel cylindrical shells under implosion loading.Combined with water-well recovery tests,the dynamic fragmentation performance of the shells was analyzed,and the axial crack propagation and dynamic fragmentation performance of metal cylindrical shells under different wall thicknesses were obtained.The results show that:for different relative wall thicknesses,the numbers of axial cracks are smaller at both ends and larger in the middle;at the same position,the numbers of cracks decrease as the relative wall thickness of the shell decreases;the maximum numbers of cracks on the shell surface under different relative wall thicknesses decrease from 19 to 8,a reduction of 57.89%;as the relative wall thickness decreases,the propagation rate of cracks towards the non-initiating end generally shows a downward trend.In addition,as the relative wall thickness decreases,the fragmentation parameter of the shell gradually decreases,from 824.96(when the relative wall thickness is 6)to 386.17(when the relative wall thickness is 1.76).This research provides a basis for optimizing the structural design and regulating the fragmentation performance of metal cylindrical shells under dynamic loading.关键词
内爆载荷/裂纹扩展/破碎性能/40CrMnSiB钢Key words
implosion loading/crack propagation/fragmentation performance/40CrMnSiB steel分类
军事科技引用本文复制引用
Liu Zhe,Li Weibing,Luo Yusong,Li Junbao,Wang Xiaoming,Li Wenbin..内爆载荷作用下金属柱壳轴向裂纹扩展及动态破碎性能[J].南京理工大学学报（自然科学版）,2025,49(6):652-660,9.基金项目
国家自然科学基金(11972018) （11972018）
