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首页> 外文期刊>Composite Structures >Energy absorption properties of macro triclinic lattice structures with twin boundaries inspired by microstructure of feldspar twinning crystals
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Energy absorption properties of macro triclinic lattice structures with twin boundaries inspired by microstructure of feldspar twinning crystals

机译：宏观三星晶格结构与双界性的能量吸收性能灵感来自长石孪晶晶体的微观结构

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摘要

Inspired by the microstructure of the triclinic crystal material, in this work we designed triclinic lattice structures (TC) with twin boundaries for energy absorption application. The deformation mode and energy absorption capacity of TCs under the quasi-static compression are investigated by finite element method, which is validated by the experiments on the TC specimen additively manufactured by the selective laser sintering (SLS) method. The TC design is further extended to the triclinic body-centered cubic lattice structures (TBCC). The results indicate that introducing twin boundaries into the lattice structure can control the deformation mode and thus improve the energy absorption performance. The energy absorption increases with the number of twin boundaries in both TCs and TBCCs. In addition, the plateau stress and the equivalent grain size of the proposed structures are found to also obey the Hall-Petch relationship that is prevalent in the polycrystal materials. This work verifies the feasibility of the approach of designing novel lattice structures by mimicking the material microstructures.
机译：在这项工作中，通过三级晶体材料的微观结构的启发，我们设计了三角形晶格结构（TC），具有双界用于能量吸收应用。通过有限元方法研究了在准静态压缩下TCS的变形模式和能量吸收能力，其通过通过选择性激光烧结（SLS）方法加剧制造的TC样本的实验验证。 TC设计进一步延伸到三级以中心的立方晶格结构（TBCC）。结果表明，在晶格结构中引入双界可以控制变形模式，从而提高能量吸收性能。能量吸收随着TCS和TBCC的双界数增加。此外，发现所提出的结构的平台应力和等效晶粒尺寸也遵循多晶体材料中普遍的霍尔辅助关系。这项工作通过模拟材料微观结构来验证设计新晶格结构的方法的可行性。

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  • 来源
    《Composite Structures》 |2021年第9期|114103.1-114103.14|共14页
  • 作者

    Bian Yijie; Yang Fan; Li Puhao; Wang Peng; Li Weiwei; Fan Hualin;

  • 作者单位

    Tongji Univ Sch Aerosp Engn & Appl Mech Shanghai 200092 Peoples R China;

    Tongji Univ Sch Aerosp Engn & Appl Mech Shanghai 200092 Peoples R China;

    Tongji Univ Sch Aerosp Engn & Appl Mech Shanghai 200092 Peoples R China;

    Tongji Univ Sch Aerosp Engn & Appl Mech Shanghai 200092 Peoples R China;

    Nanyang Inst Technol Dept Civil Engn Nanyang 473004 Peoples R China;

    Nanjing Univ Aeronaut & Astronaut Res Ctr Lightweight Struct & Intelligent Mfg State Key Lab Mech & Control Mech Struct Nanjing 210016 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Triclinic crystal; Lattice structure; Deformation mode; Energy absorption; Hall-Petch relationship;

    机译：三晶晶体;晶格结构;变形模式;能量吸收;霍尔 - 辅助关系;

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