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[1]解北京,梁天宇,李晓旭,等.3种基体材料开孔泡沫金属动力学特征研究*[J].中国安全生产科学技术,2023,19(7):30-36.[doi:10.11731/j.issn.1673-193x.2023.07.005]
　XIE Beijing,LIANG Tianyu,LI Xiaoxu,et al.Study on dynamic characteristics of open-cell metal foams with three kinds of matrix materials[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(7):30-36.[doi:10.11731/j.issn.1673-193x.2023.07.005]
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3种基体材料开孔泡沫金属动力学特征研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年7期
页码:
30-36
栏目:
学术论著
出版日期:
2023-07-31

文章信息/Info

Title:
Study on dynamic characteristics of open-cell metal foams with three kinds of matrix materials
文章编号:
1673-193X(2023)-07-0030-07
作者:
解北京; 梁天宇; 李晓旭; 石嘉煜; 陈思羽; 姜聪
（1.中国矿业大学（北京） 应急管理与安全工程学院，北京100083；
2.北京理工大学 机电学院，北京 100081)
Author(s):
XIE Beijing;  LIANG Tianyu;  LI Xiaoxu;  SHI Jiayu;  CHEN Siyu;  JIANG Cong
（1.School of Emergency Management and Safety Engineering,China University of Mining and Technology (Beijing),Beijing 100083,China;
2.School of Mechanical and Electrical Engineering,Beijing Institute of Technology,Beijing 100081,China)
关键词:
开孔泡沫金属; 应变率; 分离式霍普金森压杆（SHPB）; 变形特征
Keywords:
open-cell metal foam;  strain rate;  split Hopkinson pressure bar (SHPB);  deformation characteristic
分类号:
X941；TG146.4
DOI:
10.11731/j.issn.1673-193x.2023.07.005
文献标志码:
A
摘要:
为研究不同基体材料开孔泡沫金属的动力学特性，采用分离式霍普金森压杆（SHPB）及高速摄像系统开展试验，获得3种开孔泡沫金属试样的应力-应变曲线、应变特性、变形特征。研究结果表明：不同基体材料开孔泡沫金属的动力学特性差异显著，其应力-应变曲线的差异主要体现在弹性上升阶段，泡沫铜和泡沫镍具有明显的跃进现象，泡沫铝的曲线上升较平稳缓慢，且泡沫镍在跃进后出现峰后跌落现象；泡沫金属峰值应力的应变率效应显著，其动力学性能与材料本身缺陷情况、惯性效应、冲击热效应存在密切关联；当试样处于整体变形阶段，试样入射端或胞孔薄弱处存在加速变形区域，易形成应力集中现象，导致试样层面坍塌。研究结果可为泡沫金属防护材料的选取及工程设计提供理论参考。
Abstract:
In order to study the dynamic characteristics of open-cell metal foams with different matrix materials,the experiments were carried out by using split Hopkinson pressure bar (SHPB) and high-speed camera system,and the stress-strain curves,strain characteristics and deformation characteristics of three kinds of open-cell metal foam samples were obtained.The results show that there are significant difference in the dynamic characteristics of open-cell metal foams with different matrix materials,and the difference of stress-strain curve is mainly reflected in the elastic rising stage.The copper foam and nickel foam have obvious leaping phenomenon,while the curve of aluminum foam rises steadily and slowly,and the nickel foam has a post-peak drop phenomenon after the jump.The strain rate effect of the peak stress of metal foam is significant,and its dynamic performance is closely related to the defect,inertia effect and impact thermal effect of the material.When the sample is in the overall deformation stage,there is an accelerated deformation region at the incident end or weak cell of the sample,which is easy to form the stress concentration phenomenon and leads to the collapse of the sample layer.The research results can provide theoretical reference for the selection and engineering design of metal foam protective materials.

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备注/Memo

备注/Memo:
收稿日期： 2023-02-19
* 基金项目： 国家重点研发计划项目（2022YFC2904100）；中央高校基本科研业务费专项资金项目（2023ZKPYAQ04）；煤炭资源与安全开采国家重点实验室大学生科技创新计划项目（SKLCRSM20DC12）
作者简介： 解北京，博士，副教授，主要研究方向为煤岩动力灾害。
更新日期/Last Update: 2023-08-07