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曲面碳/碳蜂窝制备及其均布载荷下的力学性能

武豪 李玮洁 张中伟 刘愚 雷宇 史文童 董志超

武豪, 李玮洁, 张中伟, 等. 曲面碳/碳蜂窝制备及其均布载荷下的力学性能[J]. 复合材料学报, 2024, 42(0): 1-9.
引用本文: 武豪, 李玮洁, 张中伟, 等. 曲面碳/碳蜂窝制备及其均布载荷下的力学性能[J]. 复合材料学报, 2024, 42(0): 1-9.
WU Hao, LI Weijie, ZHANG Zhongwei, et al. Preparation of curved carbon/carbon honeycomb and its mechanical properties under uniform load[J]. Acta Materiae Compositae Sinica.
Citation: WU Hao, LI Weijie, ZHANG Zhongwei, et al. Preparation of curved carbon/carbon honeycomb and its mechanical properties under uniform load[J]. Acta Materiae Compositae Sinica.

曲面碳/碳蜂窝制备及其均布载荷下的力学性能

基金项目: 国家重点研发计划(2022YFB3706100)
详细信息
    通讯作者:

    李玮洁,博士,教授,博士生导师,研究方向为新型材料和结构的力学行为 E-mail: wj.li@bjtu.edu.cn

    张中伟,博士,研究员,博士生导师,研究方向为碳/碳、碳/陶、超高温陶瓷等复合材料 E-mail: zhangzhongw@163.com

    刘愚,博士,副研究员,硕士生导师,研究方向为碳基复合材料 E-mail: yu_liu@csu.edu.cn

  • 中图分类号: TB332

Preparation of curved carbon/carbon honeycomb and its mechanical properties under uniform load

Funds: National Key Research and Development Program of China (2022YFB3706100)
  • 摘要: 精密仪器对承载平台结构的要求不断提高,蜂窝结构由于其轻质和超高稳定性的特点而受到广泛关注。为了满足异形复合材料承载平台的需求,本文采用热压成型和树脂浸渍碳化-化学气相沉积(CVD)相结合的工艺制备了不同规格曲面碳/碳蜂窝结构试样,而后,根据曲面蜂窝的结构特点和服役环境,设计了均布载荷的测试方法对不同试样进行压缩试验,分析了蜂窝厚度、铺层角度、曲率半径等因素对曲面蜂窝力学性能的影响规律。结果表明,当蜂窝的径向厚度增大时,蜂窝壁屈曲程度增大,蜂窝双层壁处所受载荷增大,胶粘面开裂倾向更加显著;当蜂窝纤维取向由0°至45°转变蜂窝壁皱曲转变方式为不皱曲-韧性皱曲-塑性皱曲;当曲面蜂窝的曲率半径减小时,其破坏模式逐渐由双层壁脱粘开裂向蜂窝壁的屈曲断裂转变。本文制备的曲面碳/碳蜂窝压缩强度达到1.48 MPa,具备良好的力学性能,可以满足日益复杂化的航天结构承载需求。

     

  • 图  1  曲面蜂窝结构与胞元选取示意图

    Figure  1.  Curved honeycomb structure and cell selection diagram

    图  2  两种曲面蜂窝的构型

    Figure  2.  Two curved honeycomb configurations

    图  3  曲面碳/碳蜂窝的制备及测试过程

    Figure  3.  Preparation and testing process of C/C curved honeycomb

    图  4  曲面蜂窝载荷分解示意图

    Figure  4.  Diagram of honeycomb load decomposition of curved surface

    图  5  化学气相沉积后蜂窝样品的断口微观形貌

    Figure  5.  Fracture morphology of honeycomb samples after CVI

    图  6  C1规格蜂窝压缩破坏载荷-位移曲线

    Figure  6.  C1 honeycomb compression failure load-displacement curve

    图  7  C1规格蜂窝压缩破坏过程

    Figure  7.  C1 specification cellular compression breakdown process

    图  8  曲面蜂窝不同位置受力示意图

    Figure  8.  Force diagram of curved honeycomb at different positions

    图  9  C2规格蜂窝压缩破坏载荷-位移曲线

    Figure  9.  C2 honeycomb compression failure load-displacement curve

    图  10  C2规格蜂窝压缩破坏过程

    Figure  10.  C2 specification cellular compression breakdown process

    图  11  C1、C2、C3规格蜂窝压缩破坏载荷-位移曲线

    Figure  11.  C1, C2, C3 honeycomb compression failure load-displacement curve

    图  12  C3规格蜂窝压缩破坏过程

    Figure  12.  C3 specification cellular compression breakdown process

    图  13  C4规格蜂窝压缩破坏过程

    Figure  13.  C4 specification cellular compression destruction process

    图  14  C1、C5、C6规格蜂窝压缩破坏载荷-位移曲线

    Figure  14.  C1, C5, C6 honeycomb compression failure load-displacement curve

    图  15  C5规格蜂窝压缩破坏过程

    Figure  15.  C5 specification honeycomb compression failure process

    图  16  C6规格蜂窝压缩破坏过程

    Figure  16.  C6 specification honeycomb compression failure process

    表  1  不同设计参数下样品的规格与编号

    Table  1.   Sample specification and number under different design parameters

    Specification number Radius of curvature /mm Radial thickness /mm Fiber orientation weight /g density /(g·cm−3)
    C1 180 20 0°/90° 8.73 0.380
    C2 180 15 0°/90° 5.68 0.334
    C3 180 20 30°/−60° 7.74 0.337
    C4 180 20 45°/−45° 8.11 0.353
    C5 150 20 0°/90° 8.66 0.373
    C6 120 20 0°/90° 8.49 0.360
    下载: 导出CSV

    表  2  不同曲面径向厚度曲面蜂窝的压缩强度

    Table  2.   Compressive strength of curved honeycomb with different axial thickness

    Specification numberRadial thickness /mmCompressive strength /MPaDispersion ratio /%
    C1201.1574.15
    C2151.4223.47
    下载: 导出CSV

    表  3  不同纤维取向曲面蜂窝的压缩强度

    Table  3.   Compressive strength of honeycomb with different fiber orientation curved surfaces

    Specification number Fiber orientation Compressive strength /MPa Dispersion ratio /%
    C1 0°/90° 1.157 4.15
    C3 30°/−60° 1.476 7.79
    C4 45°/−45° 1.366 6.81
    下载: 导出CSV

    表  4  不同曲率半径曲面蜂窝的压缩强度

    Table  4.   Compressive strength of curved honeycomb with different curvature radius

    Specification numberRadius of curvature /mmCompressive strength /MPaDispersion ratio /%
    C11801.1574.15
    C51501.2377.11
    C61201.3221.29
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-12-08
  • 修回日期:  2024-01-19
  • 录用日期:  2024-01-31
  • 网络出版日期:  2024-03-12

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