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常规和内凹六边形管横向压缩载荷下变形模式和吸能性能

刘杰 刘华 杨嘉陵

刘杰,刘华,杨嘉陵. 常规和内凹六边形管横向压缩载荷下变形模式和吸能性能[J]. 北京航空航天大学学报,2023,49(8):2021-2028 doi: 10.13700/j.bh.1001-5965.2021.0623
引用本文: 刘杰,刘华,杨嘉陵. 常规和内凹六边形管横向压缩载荷下变形模式和吸能性能[J]. 北京航空航天大学学报,2023,49(8):2021-2028 doi: 10.13700/j.bh.1001-5965.2021.0623
LIU J,LIU H,YANG J L. Collapse modes and energy absorption performance of conventional and re-entrant hexagonal tubes under lateral compression[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(8):2021-2028 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0623
Citation: LIU J,LIU H,YANG J L. Collapse modes and energy absorption performance of conventional and re-entrant hexagonal tubes under lateral compression[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(8):2021-2028 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0623

常规和内凹六边形管横向压缩载荷下变形模式和吸能性能

doi: 10.13700/j.bh.1001-5965.2021.0623
基金项目: 国家自然科学基金(11472034,11472035);北京航空航天大学博士研究生卓越学术基金
详细信息
    通讯作者:

    E-mail: liuhuarui@buaa.edu.cn

  • 中图分类号: O344

Collapse modes and energy absorption performance of conventional and re-entrant hexagonal tubes under lateral compression

Funds: National Natural Science Foundation of China (11472034,11472035);Academic Excellence Foundation of BUAA for PhD Students
More Information
  • 摘要:

    六边形薄壁结构被广泛应用于吸能防护领域。为提升六边形薄壁管的吸能性能,对常规六边形薄壁管和内凹六边形薄壁管在横向压缩载荷作用下的变形模式和吸能性能进行对比研究。针对这2种六边形管分别建立考虑应变强化效应的理论模型,运用商业软件ABAQUS进行有限元分析。对比理论模型和有限元分析得到的六边形管变形模式及载荷-位移关系,理论结果和有限元结果具有良好的一致性。针对2种六边形管,分别设置不同的侧边倾斜角,探究不同六边形管在横向压缩载荷作用下的塑性变形行为和吸能性能。结果表明:内凹六边形管相比于对应的常规六边形管具备更优的吸能性能,内凹六边形管的冲程效率和总吸能分别为对应的常规六边形管的1.41~1.62倍和1.79~1.83倍。另外,内凹六边形管所需的横向安装空间更小。

     

  • 图 1  常规六边形管和内凹六边形管变形模式

    Figure 1.  Deformation modes of conventional and re-entrant hexagonal tubes

    图 2  常规六边形管横向压缩变形1/4模型

    Figure 2.  Model of one-quarter of conventional hexagonal tube under lateral compression

    图 3  内凹六边形管横向压缩变形1/4模型

    Figure 3.  Model of one-quarter of re-entrant hexagonal tube under lateral compression

    图 4  常规和内凹六边形管有限元模型

    Figure 4.  Finite element models of conventional and re-entrant hexagonal tubes

    图 5  常规六边形管压缩过程Mises应力云图

    Figure 5.  Mises stress cloud diagram of conventional hexagonal tube under lateral compression

    图 6  内凹六边形管压缩过程Mises应力云图

    Figure 6.  Mises stress cloud diagram of re-entrant hexagonal tube under lateral compression

    图 7  六边形管等效塑性应变云图

    Figure 7.  Equivalent plastic strain cloud diagram of hexagonal tube

    图 8  塑性铰等效长度系数

    Figure 8.  Equivalent length factor of plastic hinge

    图 9  不同倾斜角六边形管载荷-位移关系曲线和能量吸收效率-位移曲线

    Figure 9.  Force-displacement relation curves and energy absorption efficiency-displacement relation curves of hexagonal tubes with different inclination angles

    图 10  不同倾斜角六边形管载荷-位移关系曲线

    Figure 10.  Force-displacement relation curves of hexagonal tubes with different inclination angles

    图 11  不同倾斜角六边形管冲程效率

    Figure 11.  Stroke efficiency of hexagonal tubes with different inclination angles

    图 12  不同倾斜角六边形管总吸能

    Figure 12.  Total energy absorption of hexagonal tubes with different inclination angles

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出版历程
  • 收稿日期:  2021-10-22
  • 录用日期:  2022-01-02
  • 网络出版日期:  2022-01-29
  • 整期出版日期:  2023-08-31

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