爆炸载荷下仿贝壳Voronoi砖泥结构的动态响应

陈鑫康 李志洋 雷建银 刘志芳

陈鑫康, 李志洋, 雷建银, 刘志芳. 爆炸载荷下仿贝壳Voronoi砖泥结构的动态响应[J]. 高压物理学报, 2024, 38(6): 064108. doi: 10.11858/gywlxb.20240772
引用本文: 陈鑫康, 李志洋, 雷建银, 刘志芳. 爆炸载荷下仿贝壳Voronoi砖泥结构的动态响应[J]. 高压物理学报, 2024, 38(6): 064108. doi: 10.11858/gywlxb.20240772
CHEN Xinkang, LI Zhiyang, LEI Jianyin, LIU Zhifang. Dynamic Response of Nacre-Like Voronoi Brick and Mortar Structure under Explosive Load[J]. Chinese Journal of High Pressure Physics, 2024, 38(6): 064108. doi: 10.11858/gywlxb.20240772
Citation: CHEN Xinkang, LI Zhiyang, LEI Jianyin, LIU Zhifang. Dynamic Response of Nacre-Like Voronoi Brick and Mortar Structure under Explosive Load[J]. Chinese Journal of High Pressure Physics, 2024, 38(6): 064108. doi: 10.11858/gywlxb.20240772

爆炸载荷下仿贝壳Voronoi砖泥结构的动态响应

doi: 10.11858/gywlxb.20240772
基金项目: 国家自然科学基金(12372363,12272254);山西省自然科学基金(202203021211170)
详细信息
    作者简介:

    陈鑫康(1997-),男,硕士,主要从事材料冲击动力学行为研究. E-mail:2107874508@qq.com

    通讯作者:

    雷建银(1989-),男,博士,副教授,主要从事材料冲击动力学行为研究. E-mail:leijianyin@tyut.edu.cn

  • 中图分类号: O341; O521.9

Dynamic Response of Nacre-Like Voronoi Brick and Mortar Structure under Explosive Load

  • 摘要: 基于贝壳多尺度、多层级的砖泥结构,构建仿贝壳Voronoi砖泥结构。通过将3D打印、爆炸实验和数值模拟相结合,探索仿贝壳Voronoi砖泥结构在爆炸载荷下的动力学响应,研究Voronoi单元尺寸和层内软材料厚度对结构变形破坏模式和能量吸收的影响。实验结果表明:在40 g球形乳化炸药作用下,仿贝壳Voronoi砖泥结构的前面板中心处出现了向四周蔓延的径向裂纹,后面板出现小块材料脱落。在此基础上,建立了有限元模型,并验证了其有效性。随着药量的增加,仿贝壳Voronoi砖泥结构主要分为塑性变形、前后面板裂纹、小块材料脱落、结构整体贯穿破坏伴随夹持端剪切破坏4种破坏模式。研究发现:仿贝壳Voronoi砖泥结构中硬材料的水平正应力远大于垂直正应力,层间软材料的剪应变大于层内软材料的剪应变。层间软材料的比吸能远大于硬材料的比吸能,约为硬材料的1.8~2.3倍;随着Voronoi单元尺寸的增大,层内软材料的比吸能增大了45.6%;随着层内软材料厚度增加,层内软材料的比吸能增大了31.1%,允许结构进一步的塑性变形。研究结果为仿生结构设计提供了一定的技术依据。

     

  • 图  仿贝壳Voronoi砖泥结构的构建流程:(a) 单层硬材料,(b) 单层仿贝壳Voronoi砖泥结构,(c) 3层仿贝壳Voronoi砖泥结构

    Figure  1.  Construction flowchart of nacre-like Voronoi brick and mortar structures: (a) single layer of stiff material; (b) single layer of nacre-like Voronoi brick and mortar structure; (c) three layers of nacre-like Voronoi brick and mortar structure

    图  爆炸实验装置及试样

    Figure  2.  Explosion experimental device and sample

    图  爆炸实验结果

    Figure  3.  Explosive experimental result

    图  仿贝壳Voronoi砖泥结构有限元模型

    Figure  4.  Finite element model of the nacre-like Voronoi brick and mortar structure

    图  试样1的数值模拟结果

    Figure  5.  Simulation results of sample 1

    图  不同炸药药量下仿贝壳Voronoi砖泥结构的破坏模式

    Figure  6.  Damage modes of nacre-like Voronoi brick and mortar structure under different explosive charges

    图  仿贝壳Voronoi砖泥结构的应力和应变云图:(a) 硬材料水平正应力,(b) 硬材料垂直正应力,(c) 层间软材料的剪切应变,(d) 层内软材料的剪切应变

    Figure  7.  Stress and strain contour plots of nacre-like Voronoi brick and mortar structure: (a) horizontal normal strain of the stiff material; (b) vertical normal stress of the stiff material; (c) shear strain of the interlaminar soft material; (d) shear strain of the intralaminar soft material

    图  不同堆叠层数仿贝壳Voronoi砖泥结构的破坏模式

    Figure  8.  Damage modes of nacre-like Voronoi brick and mortar structure with different layer numbers

    图  不同Voronoi单元尺寸试样的破坏模式

    Figure  9.  Damage modes of samples with different Voronoi element sizes

    图  10  不同软材料厚度试样的破坏模式

    Figure  10.  Damage modes of samples with different thickness of soft material

    表  1  试样的几何参数

    Table  1.   Geometrical parameters of samples

    Sample No. Voronoi cell
    size/mm
    Soft material
    thickness/mm
    Number of plies Mass of emulsion
    explosive/g
    Volume fraction of
    soft material/%
    1 10 0.8 3 40 27.3
    2 10 0.8 3 20 27.3
    3 10 0.8 3 30 27.3
    4 10 0.8 3 50 27.3
    5 10 0.8 1 40 11.9
    6 10 0.8 2 40 21.7
    7 10 0.8 4 40 25.4
    8 14 0.8 3 40 22.8
    9 18 0.8 3 40 20.1
    10 10 1.2 3 40 29.9
    11 10 1.6 3 40 35.5
    下载: 导出CSV

    表  2  不同单元尺寸、层内软材料厚度的3层砖泥结构各组分的比吸能

    Table  2.   $E_{\mathrm{SA}} $ of each component of 3-layer structure with different element size and soft material thickness

    Cell size/mm Soft material thickness/mm Volume fraction of
    soft material/%
    ESA of interlaminar soft material/(J·kg–1) ESA of intralaminar soft material/(J·kg–1) ESA of stiff material/(J·kg–1)
    10 0.8 27.3 138.1 37.9 63.7
    12 0.8 24.6 138.5 43.5 61.6
    14 0.8 22.8 138.5 44.9 61.0
    16 0.8 22.1 138.5 46.2 60.9
    18 0.8 20.1 141.1 55.2 60.9
    10 1.0 29.6 124.6 46.5 63.0
    10 1.2 29.9 124.2 47.8 65.6
    10 1.4 34.3 125.6 49.7 70.9
    10 1.6 35.5 122.5 52.3 66.4
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-04-03
  • 修回日期:  2024-04-09
  • 网络出版日期:  2024-11-25
  • 刊出日期:  2024-12-05

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