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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
Numerical simulation and design on energy absorption for metal thin-walled structures with double-layered nested style aid local surface nanocrystallization
投稿时间:2020-04-04  修订日期:2020-06-02
DOI:
中文关键词:  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
英文关键词:double-layered nested thin-walled structure  local surface nanocrystallization  energy absorption device  specific energy absorption  peak crushing force
基金项目:
作者单位E-mail
赵祯 大连理工大学 zhaozhen@mail.dlut.edu.cn 
王伟 大连理工大学  
廉增博 大连理工大学  
王钧仡 大连理工大学  
仝真真 大连交通大学  
林志华 香港城市大学  
周震寰 大连理工大学  
徐新生 大连理工大学 xsxu@dlut.edu.cn 
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中文摘要:
      基于局部表面纳米化技术,本文设计了一种双层嵌套式金属薄壁吸能结构。在研究了表面纳米化技术对金属力学性能影响的基础上,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。
英文摘要:
      Based on the local surface nanocrystallization technology, the metal thin-walled structures with double-layered nested style were designed in this paper. Over the basis of 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, the design schemes and energy absorption properties were obtained subsequently. Study 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 metal thin-walled structure with 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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