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泡沫混凝土填充双箭头结构的准静态压缩性能

周宏元 郭春燕 王小娟 张宏

周宏元, 郭春燕, 王小娟, 等. 泡沫混凝土填充双箭头结构的准静态压缩性能[J]. 复合材料学报, 2024, 42(0): 1-12.
引用本文: 周宏元, 郭春燕, 王小娟, 等. 泡沫混凝土填充双箭头结构的准静态压缩性能[J]. 复合材料学报, 2024, 42(0): 1-12.
ZHOU Hongyuan, GUO Chunyan, WANG Xiaojuan, et al. Quasi-static compression performance of double arrowhead honeycomb filled with foam concrete[J]. Acta Materiae Compositae Sinica.
Citation: ZHOU Hongyuan, GUO Chunyan, WANG Xiaojuan, et al. Quasi-static compression performance of double arrowhead honeycomb filled with foam concrete[J]. Acta Materiae Compositae Sinica.

泡沫混凝土填充双箭头结构的准静态压缩性能

基金项目: 国家自然科学基金 (52278477;52178096);北京理工大学爆炸科学与安全防护国家重点实验室开放基金 (KFJJ23-12M)
详细信息
    通讯作者:

    王小娟,博士,副教授,博士生导师,研究方向为建筑材料力学性能 E-mail: xiaojuanwang@bjut.edu.cn

  • 中图分类号: TB301; TB333

Quasi-static compression performance of double arrowhead honeycomb filled with foam concrete

Funds: National Natural Science Foundation of China (52278477; 52178096); Open Foundation of State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology (KFJJ23-12M)
  • 摘要: 为提高三明治结构的力学和能量吸收性能,提出一种泡沫混凝土填充双箭头结构。制作双箭头结构并填充不同强度的低密度泡沫混凝土,通过试验得到准静态压缩下填充泡沫混凝土双箭头结构的变形模式、力学性能和能量吸收性能,并使用经试验验证的数值模型进一步分析了胞壁厚度与泡沫混凝土强度、胞元角度等重要因素对此填充结构压缩性能的影响。结果表明:双箭头结构可约束泡沫混凝土,双箭头结构和泡沫混凝土的合理匹配可有效利用两者间的相互作用,优化能量吸收性能。泡沫混凝土填充双箭头结构平均压缩强度的增量随填充泡沫混凝土强度的升高而升高,胞壁厚度为0.2 mm时,填充强度为0.46 MPa泡沫混凝土的结构比吸能最大;胞壁厚度为0.4 mm时,填充强度为1.02 MPa泡沫混凝土的结构比吸能最大。增加胞壁厚度可提高平均压缩强度的增量,提高比吸能。调整胞元角度,可实现对平均压缩强度增量和比吸能的调控。

     

  • 图  1  试件设计

    Figure  1.  Design of specimens

    图  2  双箭头结构和泡沫混凝土填充双箭头结构试件的制作过程

    Figure  2.  Manufacturing process of double arrowhead honeycomb filled with foam concrete

    图  3  四种密度泡沫混凝土的名义应力-应变曲线

    Figure  3.  Nominal stress-strain curves of foam concrete of four densities

    图  4  双箭头结构的变形模式

    Figure  4.  Deformation modes of double arrowhead honeycomb

    图  5  较低强度泡沫混凝土填充双箭头结构的变形模式

    Figure  5.  Deformation modes of double arrowhead honeycombs filled with relatively low-strength foam concrete

    图  6  较高强度泡沫混凝土填充双箭头结构的变形模式

    Figure  6.  Deformation modes of double arrowhead honeycomb filled with relatively high-strength foam concrete

    图  7  不同强度泡沫混凝土填充双箭头结构的名义应力-应变曲线

    Figure  7.  Nominal stress-strain curves of double arrowhead honeycombs filled with foam concrete of different strength

    图  8  不同强度泡沫混凝土填充双箭头结构的平均压缩强度

    Figure  8.  Mean crushing strength of double arrowhead honeycombs filled with foam concrete of different strength

    图  9  不同强度泡沫混凝土填充双箭头结构的比吸能

    Figure  9.  SEA of double arrowhead honeycombs filled with foam concrete of different strength

    图  10  泡沫混凝土填充双箭头结构的数值模型

    Figure  10.  Numerical model of double arrowhead honeycomb filled with foam concrete

    图  11  不同网格尺寸模型得到泡沫混凝土填充双箭头结构压缩名义应力-应变关系比较

    Figure  11.  Nominal stress-strain relation comparison of double arrowhead honeycomb filled with foam concrete with models of different mesh sizes

    图  12  结构变形模式试验和数值模拟结果的比较

    Figure  12.  Comparison of structural deformation modes obtained from experiment and numerical simulation

    图  13  空的和填充泡沫混凝土双箭头结构名义应力-应变曲线试验和数值模拟结果比较

    Figure  13.  Comparison of the nominal stress-strain curves of hollow and foam concrete filled structures obtained from experiment and numerical simulation

    图  14  泡沫混凝土强度和胞壁厚度对泡沫混凝土填充双箭头结构平均压缩强度的影响

    Figure  14.  Influence of foam concrete strength and cell wall thickness on the mean crushing strength of double arrowhead honeycombs filled with foam concrete

    图  15  泡沫混凝土强度和胞壁厚度对泡沫混凝土填充双箭头结构比吸能的影响

    Figure  15.  Influence of foam concrete strength and cell wall thickness on the SEA of double arrowhead honeycombs filled with foam concrete

    图  16  泡沫混凝土填充不同角度胞元双箭头结构几何模型

    Figure  16.  Geometric model of double arrowhead honeycombs of different angles filled with foam concrete

    图  17  泡沫混凝土填充不同角度胞元双箭头结构的泊松比-应变关系

    Figure  17.  Poisson’s ratio-strain relations of double arrowhead honeycombs of different angles filled with foam concrete

    图  18  泡沫混凝土填充不同角度胞元双箭头结构的名义应力-应变曲线

    Figure  18.  Nominal stress-strain curves of double arrowhead honeycombs of different θ filled with foam concrete

    图  19  胞元角度对泡沫混凝土填充双箭头结构平均压缩强度的影响

    Figure  19.  Influence of cell angle on the mean crushing strength of double arrowhead honeycombs filled with foam concrete

    图  20  泡沫混凝土填充不同角度胞元角度双箭头结构的比吸能

    Figure  20.  SEA of double arrowhead honeycombs of different angles filled with foam concrete

    表  1  铝的力学性能

    Table  1.   Mechanical properties of aluminum

    Aluminum Density/(kg·m-3) Young’s modulus/GPa Yield strength/MPa Ultimate strength/MPa
    1060 2680 68.9 15 65
    3A21 2730 69.2 100 134
    下载: 导出CSV

    表  2  试件的参数

    Table  2.   Parameters of the specimens

    Sample Bottom
    area/mm2
    Height/mm Mass/g Foam concrete
    density/(kg·m−3)
    Compressive strength of
    foam concrete/MPa
    DAH 7600 115 402
    DAH-FC-0.10 7760 120 598 227 0.10
    DAH-FC-0.46 7680 119 683 423 0.46
    DAH-FC-1.02 7600 121 916 619 1.02
    DAH-FC-1.70 7695 120 1038 838 1.70
    Notes: DAH—Double arrowhead honeycomb; FC—Foam concrete.
    下载: 导出CSV

    表  3  试件的能量吸收性能

    Table  3.   Energy absorption performance of specimens

    Specimen Densification strain Mean crushing strength/MPa SEA/(J·g−1)
    DAH 0.542 1.514 1.785
    DAH-FC-0.10 0.433 1.973 1.330
    DAH-FC-0.46 0.413 3.096 1.693
    DAH-FC-1.02 0.401 4.843 1.950
    DAH-FC-1.70 0.350 5.884 1.809
    Notes: SEA—Specific energy absorption.
    下载: 导出CSV

    表  4  不同泡沫混凝土强度和胞壁厚度下泡沫混凝土填充双箭头结构的质量(g)

    Table  4.   Mass of double arrowhead honeycombs filled with foam concrete with different strength of foam concrete and cell wall thickness (g)

    Foam concrete
    density/(kg·m−3)
    Cell wall thickness/mm
    0.2 0.4 0.6 0.8
    227 311 472 633 795
    423 442 601 761 922
    619 613 770 929 1088
    838 718 875 1032 1191
    下载: 导出CSV

    表  5  不同角度θ填充结构的能量吸收性能

    Table  5.   Energy absorption performance of filled structures at different angles

    θ1 θ2 Densification
    strain
    Mean crushing
    strength/MPa
    SEA/(J·g−1)
    45° 30° 0.457 4.756 1.738
    60° 30° 0.478 4.465 1.896
    60° 45° 0.487 3.828 1.257
    下载: 导出CSV
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  • 收稿日期:  2024-02-18
  • 修回日期:  2024-04-29
  • 录用日期:  2024-05-08
  • 网络出版日期:  2024-06-14

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