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定长炭纤维增强树脂复合材料的制备及其各向同性力学性能

向雨欣 申克 吴昊 何智成 李轩科

向雨欣, 申克, 吴昊, 何智成, 李轩科. 定长炭纤维增强树脂复合材料的制备及其各向同性力学性能[J]. 新型炭材料, 2021, 36(6): 1188-1194. doi: 10.1016/S1872-5805(21)60094-X
引用本文: 向雨欣, 申克, 吴昊, 何智成, 李轩科. 定长炭纤维增强树脂复合材料的制备及其各向同性力学性能[J]. 新型炭材料, 2021, 36(6): 1188-1194. doi: 10.1016/S1872-5805(21)60094-X
XIANG Yu-xin, SHEN Ke, WU Hao, HE Zhi-cheng, LI Xuan-ke. Preparation of fixed length carbon fiber reinforced plastic composite sheets with isotropic mechanical properties[J]. NEW CARBON MATERIALS, 2021, 36(6): 1188-1194. doi: 10.1016/S1872-5805(21)60094-X
Citation: XIANG Yu-xin, SHEN Ke, WU Hao, HE Zhi-cheng, LI Xuan-ke. Preparation of fixed length carbon fiber reinforced plastic composite sheets with isotropic mechanical properties[J]. NEW CARBON MATERIALS, 2021, 36(6): 1188-1194. doi: 10.1016/S1872-5805(21)60094-X

定长炭纤维增强树脂复合材料的制备及其各向同性力学性能

doi: 10.1016/S1872-5805(21)60094-X
基金项目: 国家自然科学基金(U1864207).
详细信息
    作者简介:

    向雨欣,硕士研究生. E-mail:xiangyuxin@hnu.edu.cn

    通讯作者:

    李轩科,教授. E-mail:xkli8524@sina.com

  • 中图分类号: TQ342+.74

Preparation of fixed length carbon fiber reinforced plastic composite sheets with isotropic mechanical properties

Funds: National Natural Science Foundation of China (U1864207).
More Information
  • 摘要: 本文分别将不同配比的30 mm定长炭纤维与乙烯基树脂基体预混合,搅拌均匀后得到片状模塑料(SMCs),再将不同纤维体积分数的SMCs通过真空热压成型工艺制备出不同面内力学各向同性的定长炭纤维增强树脂基复合材料(CFRP)。研究了不同纤维体积分数(15%~40%)的CFRP的拉伸和弯曲强度的异同,及纤维体积分数对材料面内力学各向同性特征的影响。由力学性能测试与断面分析结果可知:25%~30%纤维体积分数的CFRP中,纤维在树脂中分散性优异,不同方向上的拉伸强度离散系数仅为2%,各向同性特征最为显著;当CFRP中的炭纤维体积分数增加到一定程度时,其拉伸和弯曲强度均表现出先升后降的趋势,拉伸强度在25%时达到最大值(141.4 MPa),弯曲强度在30%时达到最大值(549.0 MPa)。同比15%纤维体积分数的CFRP,力学性能明显提高。
  • FIG. 1086.  FIG. 1086.

    FIG. 1086..  FIG. 1086.

    图  1  SMC的制备流程图

    Figure  1.  Flowchart of SMC process.

    图  2  强度试样形状和尺寸:(a) 拉伸试样和 (b) 弯曲试样

    Figure  2.  Strength test specimen shape and dimension: (a) tensile test and (b) flexural test.

    图  3  拉伸试验后典型定长CFRP的试样照片

    Figure  3.  Typical photographs of fixed length CFRP specimens after tensile test.

    图  4  6组不同体积分数拉伸试样的断面形貌

    Figure  4.  SEM images of fracture surface of 6 kinds of tensile test samples.

    图  5  不同体积分数定长纤维CFRP的(a)最大拉伸强度及(b)弯曲强度

    Figure  5.  (a) Tensile strength and (b) flexural strength of fixed length-CFRP with different fiber volume fractions.

    图  6  应力-应变曲线:(a)纯乙烯基树脂板及(b)各组定长CFRP

    Figure  6.  Stress-strain curves of (a) pure vinyl resin and (b) CFRP with different fiber volume fractions.

    图  7  定长CFRP拉伸试样切割角度示意图

    Figure  7.  Tensile specimen cutting angle diagram of fixed length CFRP.

    图  8  不同纤维体积分数定长CFRP在各角度拉伸强度趋势图

    Figure  8.  Tensile strength trend charts of composites with different fiber volume fractions in different angles.

    表  1  不同纤维体积分数复合材料在各方向上拉伸强度

    Table  1.   Tensile strength of composites with different fiber volume fractions in different directions.

    Fiber volume
    fractions
    0°direction
    (MPa)
    30°direction
    (MPa)
    60°direction
    (MPa)
    90°direction
    (MPa)
    Standard
    deviation
    Discrete
    coefficient
    15%45.978.082.459.416.925%
    20%115.199.496.697.88.78%
    25%139.1142.7143.9139.92.32%
    30%135.5136.9130.2141.44.63%
    35%116.7129.2120.9129.26.35%
    40%127.0111.6122.298.812.611%
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出版历程
  • 收稿日期:  2019-04-04
  • 修回日期:  2019-07-24
  • 网络出版日期:  2021-11-12
  • 刊出日期:  2021-12-01

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