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2.5D机织复合材料经向和纬向振动疲劳行为对比

王雅娜 任素娥 张琴 刘燕峰 何玉怀

王雅娜, 任素娥, 张琴, 等. 2.5D机织复合材料经向和纬向振动疲劳行为对比[J]. 复合材料学报, 2022, 40(0): 1-10
引用本文: 王雅娜, 任素娥, 张琴, 等. 2.5D机织复合材料经向和纬向振动疲劳行为对比[J]. 复合材料学报, 2022, 40(0): 1-10
Yana WANG, Sue REN, Qin ZHANG, Yanfeng LIU, Yuhuai HE. Comparision of vibration fatigue behaviors of 2.5D woven composites in wrap and weft directions[J]. Acta Materiae Compositae Sinica.
Citation: Yana WANG, Sue REN, Qin ZHANG, Yanfeng LIU, Yuhuai HE. Comparision of vibration fatigue behaviors of 2.5D woven composites in wrap and weft directions[J]. Acta Materiae Compositae Sinica.

2.5D机织复合材料经向和纬向振动疲劳行为对比

基金项目: 航材院益材基金 (KJ53200716)
详细信息
    通讯作者:

    王雅娜,博士,高级工程师,研究方向为复合材料力学性能测试与表征技术 E-mail: wangyana1988@163.com

  • 中图分类号: TB332

Comparision of vibration fatigue behaviors of 2.5D woven composites in wrap and weft directions

  • 摘要: 2.5D机织复合材料抗分层、耐冲击,在航空发动机结构上具有巨大的应用前景。本文对一种2.5D机织碳纤维增强双马树脂基复合材料经向和纬向试件,开展了不同名义应力水平下的一阶弯曲共振疲劳试验。试验结果表明:经向试件的振动疲劳性能优于纬向试件,随着应力水下的提高,经向和纬向试件的寿命明显缩短,而固有频率下降百分比,试件内部的损伤严重程度和损伤扩展速度都随之提高。2.5D机织复合材料经向和纬向试件在共振疲劳试验过程中的主要失效模式是纱线与基体之间脱粘造成的结构完整性丧失,从而导致试件的刚度持续下降。试件内部损伤的三维CT重构图像表明,损伤散布于试件工作段区域,应力水平越高,2.5D机织复合材料经向和纬向试件内部损伤范围越大,损伤程度越高,而且纬向试件内部损伤状态比经向试件严重。利用双对数线性寿命模型,对经向和纬向试件在不同名义应力水平下的共振疲劳试验数据进行拟合,得到2.5D机织复合材料经向和纬向试件共振疲劳S-N曲线的数学模型,得到的S-N曲线可用于预测2.5D机织复合材料的寿命。

     

  • 图  1  2.5D机织复合材料振动疲劳试件

    Figure  1.  Vibration fatigue specimens of 2.5D woven composite

    图  2  2.5D机织复合材料试件的构型和尺寸(单位mm)

    Figure  2.  Configuration and dimension of 2.5D woven composite specimens (Unit: mm)

    图  3  振动疲劳试验系统

    Figure  3.  Vibration fatigue test system

    图  4  2.5D机织复合材料拉伸应力-应变曲线

    Figure  4.  Tensile stress-strain curves of 2.5D woven composites

    图  5  2.5D机织复合材料振动疲劳试件典型的幅频曲线

    Figure  5.  Typical amplitude-frequency curve of vibration fatigue specimen made of 2.5D woven composite

    图  6  2.5D机织复合材料试件应变-位移标定曲线

    Figure  6.  Strain vs. displacement calibration curve of 2.5D woven composite specimens

    图  7  2.5D机织复合材料振动疲劳试件归一化共振f/f0频率随循环次数的变化曲线

    Figure  7.  Variation curve of normalized resonance frequency f/f0 with the number of cycles for the 2.5D woven composite vibration fatigue specimens

    图  8  2.5D机织复合材料经向试件不同名义应力水平共振疲劳试验后断口形貌

    Figure  8.  Fracture morphologies of warp-direction2.5D woven composite specimens after vibration fatigue tests under different nominal stress levels

    图  9  2.5D机织复合材料纬向试件不同应力水平共振疲劳试验后断口形貌

    Figure  9.  Fracture morphologies of weft-direction 2.5D woven composite specimens after vibration fatigue tests under different nominal stress levels

    图  10  2.5D机织复合材料经向试件内部损伤CT图像

    Figure  10.  CT images of internal damage of wrap 2.5D woven composite specimens

    图  11  2.5D机织复合材料纬向试件内部损伤CT图像

    Figure  11.  CT images of internal damage of weft 2.5D woven composite specimens

    图  12  2.5D机织复合材料振动疲劳S-N曲线

    Figure  12.  Vibration fatigue S-N curve of 2.5D woven composites

    表  1  不同应力水平下2.5D机织复合材料经向和纬向试件共振疲劳试验参数

    Table  1.   Vibration fatigue test parameters of wrap and weft 2.5D woven composite specimens under different nominal stress levels

    TypeStress
    level/
    MPa
    Strain
    level/
    %
    No.Amplitude/
    mm
    Initial
    natural
    frequency/Hz
    Wrap0.24X10.25J-12.38204
    J-22.50211
    J-32.57202
    0.26X10.27J-42.60204
    J-52.71209
    J-62.63211
    0.28X10.29J-72.82208
    J-82.69215
    J-92.75211
    0.32X10.33J-103.09215
    J-113.34212
    J-123.44207
    Weft0.18X20.20W-12.64226
    W-22.41231
    W-32.03227
    0.24X20.27W-42.80229
    W-53.08227
    W-62.68226
    0.26X20.29W-72.86215
    W-83.02220
    W-92.92224
    0.29X20.32W-103.30213
    W-113.68217
    W-123.45220
    Notes:X1 and X2 are the tensile strengths of the 2.5D woven composites in the wrap direction and weft direction, respectively.
    下载: 导出CSV

    表  2  不同名义应力水平下2.5D机织复合材料经向和纬向试件共振疲劳测试结果

    Table  2.   Vibration fatigue results of wrap and weft 2.5D woven composite specimens under different nominal stress levels

    TypeStress levelNo.Decline percentage of natural frequencyCycles
    Wrap0.24X1J-11.7010000300
    J-22.5910000200
    J-32.2810002900
    0.26X1J-44.733451410
    J-55.535839000
    J-65.216143660
    0.28X1J-76.13761800
    J-86.041402170
    J-95.791820000
    0.32X1J-109.70162823
    J-118.64102829
    J-128.86175556
    Weft0.18X2W-11.0310002900
    W-22.0610003000
    W-31.7010003000
    0.24X2W-45.372374300
    W-55.672272020
    W-65.174338750
    0.26X2W-76.03736122
    W-86.08931322
    W-96.07436673
    0.29X2W-107.98250112
    W-117.8072917
    W-128.25194576
    下载: 导出CSV
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  • 收稿日期:  2021-12-09
  • 录用日期:  2022-02-11
  • 修回日期:  2021-12-31
  • 网络出版日期:  2022-03-09

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