| 局部表面纳米化双层嵌套式金属薄壁吸能结构的数值模拟和设计 |
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| 引用本文： | 赵祯,王伟,廉增博,王钧仡,仝真真,林志华,周震寰,徐新生.局部表面纳米化双层嵌套式金属薄壁吸能结构的数值模拟和设计[J].计算力学学报,2020,37(6):770-775. |
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| 作者姓名： | 赵祯 王伟 廉增博 王钧仡 仝真真 林志华 周震寰 徐新生 |
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| 作者单位： | 大连理工大学工业装备结构分析国家重点实验室 ,大连 116024;香港城市大学建筑学及土木工程学系 ,香港;大连理工大学工业装备结构分析国家重点实验室 ,大连 116024;大连理工大学工业装备结构分析国家重点实验室 ,大连 116024;大连交通大学机车车辆工程学院 ,大连116028;香港城市大学建筑学及土木工程学系 ,香港 |
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| 基金项目： | 大连市科技创新基金双重项目（2018J11CY005）；工业装备结构分析国家重点实验室开放基金（GZ19109）资助项目. |
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| 摘 要： | 基于局部表面纳米化技术，设计了一种双层嵌套式金属薄壁吸能结构。在表面纳米化技术对金属力学性能影响的研究基础上，优化了环向交错式和连续式条纹局部表面纳米化布局，得到了双层嵌套式方管吸能结构设计方案和吸能参数。结果表明，表面纳米化对材料的屈服极限提升显著，所设计的局部纳米化双层嵌套式方管吸能结构的比吸能可提高57.1%。同时也证实局部表面纳米化是一种有效的吸能提升技术。
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| 关 键 词： | 双层嵌套式薄壁结构 局部表面纳米化 吸能装置 比吸能 峰值载荷 |
| 收稿时间： | 2020/4/4 0:00:00 |
| 修稿时间： | 2020/6/2 0:00:00 |
Numerical simulation and design on energy absorption for metal thin-walled structures with double-layered nested style aid local surface nanocrystallization |
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| ZHAO Zhen,WANG Wei,LIAN Zeng-bo,WANG Jun-yi,TONG Zhen-zhen,LIM C. W.,ZHOU Zhen-huan,XU Xin-sheng.Numerical simulation and design on energy absorption for metal thin-walled structures with double-layered nested style aid local surface nanocrystallization[J].Chinese Journal of Computational Mechanics,2020,37(6):770-775. |
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| Authors: | ZHAO Zhen WANG Wei LIAN Zeng-bo WANG Jun-yi TONG Zhen-zhen LIM C W ZHOU Zhen-huan XU Xin-sheng |
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| Institution: | State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China,State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China,State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China,State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China,State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China;College of Locomotive and Rolling Stock Engineering, Dalian Jiaotong University, Dalian 116028, China,Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China,State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China and State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | Based on the local surface nanocrystallization technology,the metal thin-walled structures with a double-layered nested style were designed in this paper.On the basis of the studies on mechanical and material modification effects by surface nanocrystallization,local surface nanocrystallization layouts with varying continuous as well as staggered stripe numbers were optimized,and the design schemes and energy absorption properties were obtained subsequently.The results demonstrate that the material yield limit is significantly improved after the local surface nanocrystallization treatment,the specific energy absorption for the optimal design of the metal thin-walled structure with a double-layered nested style is enhanced by 57.1%,which proves that the local surface nanocrystallization is an effective technology in the design of energy absorption devices. |
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| Keywords: | double-layered nested thin-walled structure local surface nanocrystallization energy absorption device specific energy absorption peak crushing force |
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