多层级夹芯结构的变形与能量吸收

冯根柱 于博丽 李世强 刘志芳

冯根柱, 于博丽, 李世强, 刘志芳. 多层级夹芯结构的变形与能量吸收[J]. 高压物理学报, 2019, 33(5): 055902. doi: 10.11858/gywlxb.20180707
引用本文: 冯根柱, 于博丽, 李世强, 刘志芳. 多层级夹芯结构的变形与能量吸收[J]. 高压物理学报, 2019, 33(5): 055902. doi: 10.11858/gywlxb.20180707
FENG Genzhu, YU Boli, LI Shiqiang, LIU Zhifang. Deformation and Energy Absorption of Multi-Hierarchical Sandwich Structures[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 055902. doi: 10.11858/gywlxb.20180707
Citation: FENG Genzhu, YU Boli, LI Shiqiang, LIU Zhifang. Deformation and Energy Absorption of Multi-Hierarchical Sandwich Structures[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 055902. doi: 10.11858/gywlxb.20180707

多层级夹芯结构的变形与能量吸收

doi: 10.11858/gywlxb.20180707
基金项目: 国家自然科学基金(11772216,11602161)
详细信息
    作者简介:

    冯根柱(1993-),男,硕士研究生,主要从事冲击动力学研究. E-mail:fenggenzhu0989@link.tyut.edu.cn

    通讯作者:

    刘志芳(1971-),女,副教授,主要从事冲击动力学研究. E-mail:liuzhifang@tyut.edu.cn

  • 中图分类号: O341

Deformation and Energy Absorption of Multi-Hierarchical Sandwich Structures

  • 摘要: 采用数值模拟与理论分析相结合的方法研究了多层级波纹板夹芯结构在准静态压缩载荷下的变形规律与能量吸收性能,建立了结构临界失效载荷的计算公式,并与数值模拟结果进行了对比,理论预测与数值模拟结果吻合较好。分析了芯层厚度对二级芯层结构在压缩载荷下的变形模式及能量吸收性能的影响,并与一级结构进行了对比。结果表明:二级芯层结构的能量吸收性能显著优于一级芯层结构;随着结构芯层厚度增加,二级结构的比吸能和载荷效率增大;芯层厚度较小时二级单层结构的比吸能高于二级双层和三层结构,二级双层结构的比吸能略高于二级三层结构。

     

  • 图  芯层结构模型设计

    Figure  1.  Corrugated core design of sandwich structure

    图  结构单胞受力示意图

    Figure  2.  Force diagram of structural unit cell

    图  小支撑变形示意图

    Figure  3.  Deformation diagram of the horizontal small supporter

    图  层级波纹板夹芯结构有限元模型

    Figure  4.  Finite element model of the hierarchical corrugated core sandwich structure

    图  6061-T6铝合金材料的应力-应变曲线

    Figure  5.  Stress-strain curve of Al 6061-T6

    图  准静态分析

    Figure  6.  Quasi-static simulation

    图  不同芯层厚度结构力-位移曲线

    Figure  7.  Force-displacement curves of the structure with different core thicknesses

    图  结构失效载荷对比

    Figure  8.  Comparison of structural failure loads

    图  一级结构变形模式

    Figure  9.  Deformation modes of the first structure

    图  10  不同芯层厚度下结构的变形模式

    Figure  10.  Deformation modes of structure with different core thicknesses

    图  11  结构的比吸能柱状图

    Figure  11.  Specific energy absorption column graph of the structure

    图  12  结构的载荷效率

    Figure  12.  Load efficiency of the structure

    表  1  6061-T6铝合金材料性能

    Table  1.   Material properties of aluminum 6061-T6

    Material${\;\rho }$/(g·cm–3)${{\sigma _{\rm{y}}}}$/MPaE/GPa${\nu }$
    Al 6061-T62.700251690.33
    下载: 导出CSV

    表  2  模型尺寸

    Table  2.   Size parameters of the model

    Typel/mmla/mmlb/mmta/mmtb/mm${ \theta }$/(°)${ \omega }$/(°)
    First order50100260
    Second order-150100100.565/0.75/1.00/1.250.565/0.75/1.00/1.256060
    Second order-250100100.565/0.75/1.00/1.250.565/0.75/1.00/1.256060
    Second order-350100100.565/0.75/1.00/1.250.565/0.75/1.00/1.256060
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-12-27
  • 修回日期:  2019-01-15

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