Crack propagation and damage evolution of metallic cylindrical shells under internal explosive loading

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外文摘要：This paper investigates the three-dimensional crack propagation and damage evolution process of metallic column shells under internal explosive loading.The calibration of four typical failure parameters for 40CrMnSiB steel was conducted through experiments and subsequently applied to simulations.The numerical simulation results employing the four failure criteria were compared with the differences and similarities observed in freeze-recovery tests and ultra-high-speed tests.This analysis addressed the critical issue of determining failure criteria for the fracture of a metal shell under internal explosive loads.Building upon this foundation,the damage parameter Dc,linked to the cumulative crack density,was defined based on the evolution characteristics of a substantial number of cracks.The relationship be-tween the damage parameter and crack velocity over time was established,and the influence of the internal central pressure on the damage parameter and crack velocity was investigated.Variations in the fracture modes were found under different failure criteria,with the principal strain failure criterion proving to be the most effective for simulating 3D crack propagation in a pure shear fracture mode.Through statistical analysis of the shell penetration fracture radius data,it was determined that the fracture radius remained essentially constant during the crack evolution process and could be considered a constant.The propagation velocity of axial cracks ranged between 5300 m/s and 12600 m/s,surpassing the Rayleigh wave velocity of the shell material and decreasing linearly with time.The increase in shell damage exhibited an initial rapid phase,followed by deceleration,demonstrating accelerated damage during the propagation stage of the blast wave and decelerated damage after the arrival of the rarefaction wave.This study provides an effective approach for investigating crack propagation and damage evo-lution.The derived crack propagation and damage evolution law serves as a valuable reference for the development of crack velocity theory and the construction of shell damage evolution modes.

外文关键词：

Internal explosive loadingFailure criterionCrack propagationDamage evolutionFreeze-recovery test

作者：

Yusong Luo、Weibing Li、Junbao Li、Wenbin Li、Xiaoming Wang

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作者单位：

ZNDY of Ministerial Key Laboratory,Nanjing University of Science and Technology,Nanjing,210094,China

基金：

National Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceChina Postdoctoral Science Foundation

项目编号：

12302437BK202309392021M701710

出版年：

2024

DOI：

10.1016/j.dt.2024.04.010

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.39(9)