Explosive fragmentation of brittle granular materials
文献类型：期刊论文
| 作者 | Zhang, Chuanshan1,2; Feng C(冯春)3; Zhou, Jun3; Xue, Kun2 |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2025-05-27 |
| 卷号 | 321页码:20 |
| 关键词 | Explosive fragmentation Brittle granular materials Fragmentation volume fraction Hardin breakage index Fractal dimension |
| ISSN号 | 0013-7944 |
| DOI | 10.1016/j.engfracmech.2025.111126 |
| 通讯作者 | Xue, Kun(xuekun@bit.edu.cn) |
| 英文摘要 | This study experimentally investigates the dynamic fragmentation behaviors of brittle granular materials subjected to explosive loadings, employing a concentric shell configuration. The setup consisted of a high-explosive sphere surrounded by a densely packed shell of dry glass spheres. To minimize reflection enhancement, the particle shells were confined within thin-walled glass casings, effectively simulating air-exposed conditions. This configuration allowed rarefaction waves reflected from the outer surface of the particle shell to significantly influence particle fragmentation, particularly in thinner shells. A specialized fragment-collecting apparatus was designed to prevent collision-induced damage to particle fragments, enabling the recovery of most fragments with preserved post-test morphologies following the explosion tests. A comprehensive analysis was conducted on the breakage extent and pulverization degree of the fragmented brittle particles, utilizing metrics such as breakage index, fragmentation volume fraction, and fractal dimension. These parameters exhibited significant variations as the particle shell thickness increased from a dimension comparable to the explosive radius to several times that radius. Notably, the thinnest particle shell underwent near-total particle crushing, evidenced by a fractal dimension of up to 3.2, indicating intense fractal crushing. When the shell thickness increased to 3.75 times the explosive radius, the fragmentation volume fraction was nearly halved, and the fractal dimension decreased significantly. These variations in fragmentation behaviors highlight the impact of divergent blast waves, which impart transient explosive loadings with rapidly decaying overpressures on the particles. The experimental results elucidate the relationship between explosive fragmentation and transient explosive loadings, providing estimations for the radii of pulverized and fractured spherical zones. Particles fragmented by explosive loadings exhibit a markedly higher fractal dimension compared to those fractured by quasi-static loadings, even when fragmentation volume fractions are similar. This suggests distinct breakage mechanisms between the two loading conditions. |
| 分类号 | 一类 |
| WOS关键词 | SHOCK-WAVE PROPAGATION ; NUMERICAL-SIMULATION ; BREAKAGE MECHANICS ; PARTICLE BREAKAGE ; COMPRESSION ; FRACTURE ; GLASS ; MITIGATION ; MEDIA |
| 资助项目 | National Natural Science Foundation of China[U1730111] ; National Natural Science Foundation of China[11972088] ; National Natural Science Foundation of China[11732003] ; State Key Laboratory of Explosive Science and Technology[QNKT19-05] ; State Key Laboratory of Explosive Science and Technology[ZDKT23-01] ; National Key Laboratory of Shock Wave and Detonation Physics[JCKYS2022212003] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001481382300001 |
| 资助机构 | National Natural Science Foundation of China ; State Key Laboratory of Explosive Science and Technology ; National Key Laboratory of Shock Wave and Detonation Physics |
| 其他责任者 | Xue, Kun |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101172]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Beijing Aerosp Inst Metrol & Measurement Technol, 1 Nan Da Hong Men Rd, Beijing 100076, Peoples R China; 2.Beijing Inst Technol, State Key Lab Explos Sci & Safety Protect, Beijing 100081, Peoples R China; 3.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Chuanshan,Feng C,Zhou, Jun,et al. Explosive fragmentation of brittle granular materials[J]. ENGINEERING FRACTURE MECHANICS,2025,321:20. |
| APA | Zhang, Chuanshan,冯春,Zhou, Jun,&Xue, Kun.(2025).Explosive fragmentation of brittle granular materials.ENGINEERING FRACTURE MECHANICS,321,20. |
| MLA | Zhang, Chuanshan,et al."Explosive fragmentation of brittle granular materials".ENGINEERING FRACTURE MECHANICS 321(2025):20. |
入库方式： OAI收割
来源：力学研究所
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