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碳纤维/树脂基复合材料曲壁蜂窝夹芯结构的三点弯曲性能

刘鑫 吴倩倩 于国财 吴林志

刘鑫,吴倩倩,于国财,吴林志. 碳纤维/树脂基复合材料曲壁蜂窝夹芯结构的三点弯曲性能 [J]. 应用数学和力学,2022,43(5):490-498 doi: 10.21656/1000-0887.430061
引用本文: 刘鑫,吴倩倩,于国财,吴林志. 碳纤维/树脂基复合材料曲壁蜂窝夹芯结构的三点弯曲性能 [J]. 应用数学和力学,2022,43(5):490-498 doi: 10.21656/1000-0887.430061
LIU Xin, WU Qianqian, YU Guocai, WU Linzhi. Three-Point Bending Properties of Carbon Fiber Reinforced Polymer Composite Honeycomb Sandwich Structures With Curved Wall[J]. Applied Mathematics and Mechanics, 2022, 43(5): 490-498. doi: 10.21656/1000-0887.430061
Citation: LIU Xin, WU Qianqian, YU Guocai, WU Linzhi. Three-Point Bending Properties of Carbon Fiber Reinforced Polymer Composite Honeycomb Sandwich Structures With Curved Wall[J]. Applied Mathematics and Mechanics, 2022, 43(5): 490-498. doi: 10.21656/1000-0887.430061

碳纤维/树脂基复合材料曲壁蜂窝夹芯结构的三点弯曲性能

doi: 10.21656/1000-0887.430061
基金项目: 国家自然科学基金(12002107);中国博士后科学基金(2019M661268)
详细信息
    作者简介:

    刘鑫(1997—),男,博士( E-mail:liuxinhit07@163.com

    吴倩倩(1989—),女,副教授,博士生导师(通讯作者. E-mail:qqwu@hit.edu.cn

  • 中图分类号: V214.6; V258+.3

Three-Point Bending Properties of Carbon Fiber Reinforced Polymer Composite Honeycomb Sandwich Structures With Curved Wall

  • 摘要:

    为研究碳纤维复合材料(CFRP)曲壁蜂窝结构在三点弯曲载荷作用下的承载特性与失效模式,对不同芯层高度、面板厚度的结构进行了理论预报、数值模拟及试验。首先,根据夹芯结构的主要失效模式,提出了相应的理论预报公式,并绘制了失效机制图;其次,建立了CFRP曲壁蜂窝夹芯结构的有限元仿真模型,对其在三点弯曲载荷作用下的典型失效行为进行模拟;最后,通过模压成型工艺制备了不同尺寸的CFRP曲壁蜂窝夹芯结构,并将试验结果与理论、模拟结果进行比较。结果表明,蜂窝夹芯结构承载能力与芯层高度、面板厚度密切相关,结构芯层及面板刚度随其尺寸的减小而下降,导致结构失效模式由面芯脱黏失效变为面板压溃失效。

  • 图  1  复合材料蜂窝夹芯结构三点弯曲试验示意图

    Figure  1.  The test schematic diagram of the composite honeycomb sandwich structure under 3-point bending load

    图  2  蜂窝夹芯结构失效机制图

    Figure  2.  Failure mechanism map of the honeycomb sandwich structures

    图  3  曲壁蜂窝夹芯结构制备流程

    Figure  3.  The preparation process of the honeycomb sandwich structure with curved wall

    图  4  试验实物图

    Figure  4.  The test photo

    图  5  试件A、B及C的试验结果

    Figure  5.  Test results of specimens A, B and C

    图  6  试件A、B及C的数值模拟结果

    Figure  6.  Simulation results of specimens A, B and C

    图  7  试验与数值模拟载荷-位移曲线

    注 为了解释图中的颜色,读者可以参考本文的电子网页版本。

    Figure  7.  Load-displacement curves of test and simulation

    表  1  碳纤维/树脂基复合材料力学性能

    Table  1.   Mechanical properties of carbon fiber reinforced polymer composites

    parametervalueparametervalueparametervalue
    E1/GPa149.6G12/MPa4 000$ \sigma _3^{\text{T}} $/MPa28
    E2/GPa8.7G13/MPa4 000$ \sigma _3^{\text{C}} $/MPa191
    E3/GPa8.7G23/MPa3 000${\tau _{12}} $/MPa73
    ${\mu _{12}} $0.3$ \sigma _1^{\text{T}} $/MPa2 444${\tau _{13}} $/MPa73
    ${\mu _{13}} $0.3$ \sigma _1^{\text{C}} $/MPa1 000${\tau _{23}} $/MPa73
    ${\mu _{23}} $0.3$ \sigma _2^{\text{T}} $/MPa28σlay/MPa25
    $ \sigma _2^{\text{C}} $/MPa191
    下载: 导出CSV

    表  2  试件几何尺寸

    Table  2.   The geometry of specimens

    specimencore length l/mmcore width b/mmcore height H/mmfacesheet thickness tf /mm
    A19674.530.40.76
    B19674.115.30.76
    C19674.215.50.26
    下载: 导出CSV

    表  3  试件的其他参数

    Table  3.   Other parameters of specimens

    specimennumber of layers (core)angle of each layer (core)number of layers (face)angle of each layer (face)quality M/g
    A3[0°/90°/0°]8[0°/90°/±45°]2s122.8
    B3[0°/90°/0°]8[0°/90°/±45°]2s85
    C3[0°/90°/0°]3[0°/90°/0°]62.7
    下载: 导出CSV

    表  4  试件A、B及C理论预测、模拟及试验结果

    Table  4.   Results of specimens A, B and C obtained through theory, simulation and experiment

    specimentheoretical failure modenumerical failure modeexperimental failure modePt /NPn /NPe /N(PePt)/Pe(PnPe)/Pn
    Adebondingdebondingdebonding17 95221 75520 103.90.1070.076
    Bdebondingdebondingdebonding10 1769 324.48 237.5−0.2350.116
    Cface crushingface crushingface crushing7 286.76 119.66 814.5−0.068−0.114
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-02-28
  • 修回日期:  2022-03-21
  • 网络出版日期:  2022-04-07
  • 刊出日期:  2022-05-15

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