跨厚比对高强玻璃纤维增强复合材料单向板弯曲性能的影响

白鑫 王云英 王雅娜 陈新文 何玉怀

白鑫, 王云英, 王雅娜, 陈新文, 何玉怀. 跨厚比对高强玻璃纤维增强复合材料单向板弯曲性能的影响[J]. 航空材料学报, 2022, 42(2): 57-63. doi: 10.11868/j.issn.1005-5053.2021.000120
引用本文: 白鑫, 王云英, 王雅娜, 陈新文, 何玉怀. 跨厚比对高强玻璃纤维增强复合材料单向板弯曲性能的影响[J]. 航空材料学报, 2022, 42(2): 57-63. doi: 10.11868/j.issn.1005-5053.2021.000120
BAI Xin, WANG Yunying, WANG Yana, CHEN Xinwen, HE Yuhuai. Effect of span-thickness ratio on bending properties of high-strength glass fiber reinforced composite unidirectional plate[J]. Journal of Aeronautical Materials, 2022, 42(2): 57-63. doi: 10.11868/j.issn.1005-5053.2021.000120
Citation: BAI Xin, WANG Yunying, WANG Yana, CHEN Xinwen, HE Yuhuai. Effect of span-thickness ratio on bending properties of high-strength glass fiber reinforced composite unidirectional plate[J]. Journal of Aeronautical Materials, 2022, 42(2): 57-63. doi: 10.11868/j.issn.1005-5053.2021.000120

跨厚比对高强玻璃纤维增强复合材料单向板弯曲性能的影响

doi: 10.11868/j.issn.1005-5053.2021.000120
基金项目: 国家自然科学基金(11764030);航空科学基金(2018ZF02005)
详细信息
    通讯作者:

    王雅娜(1988—),女,博士,高级工程师,主要从事的研究方向为复合材料力学性能测试与表征和复合材料结构分析与数值模拟,联系地址:北京市海淀区温泉镇环山村北京航空材料研究院(100095),E-mail: wangyana198833@163.com

  • 中图分类号: TB332

Effect of span-thickness ratio on bending properties of high-strength glass fiber reinforced composite unidirectional plate

  • 摘要: 采用三点弯曲实验测试不同跨厚比的S6C10-800/AC318复合材料单向板(以下简称单向板)的弯曲性能,研究跨厚比对单向板弯曲强度、弯曲模量的影响,分析试样断裂模式和弯曲破坏机制,确定单向板三点弯曲测试的临界跨厚比。结果表明:单向板弯曲强度随着跨厚比的增加而不断增加,弯曲模量随着跨厚比的增加先增大后减小;单向板的断裂模式于跨厚比α=20时发生转变,单向板分层损伤程度随着跨厚比的增加逐渐降低,但劈裂程度增加;α≤20时跨厚比越大,应力-应变曲线越符合线性关系;α>20时,应力-应变曲线不再符合线性关系;得到了任意跨厚比下单向板弯曲强度的预测公式及单向板的三点弯曲破坏的失效判定准则。

     

  • 图  1  不同跨厚比单向板的典型弯曲应力-应变曲线

    Figure  1.  Typical stress-strain curves of unidirectional plates with different span-thickness ratios

    图  2  不同跨厚比的典型断裂模式(a)α = 10;(b)α = 16;(c)α = 20;(d)α = 26;(e)α = 32;(1)受拉伸的下表面;(2)受压缩的上表面

    Figure  2.  Typical fracture modes with different span-to-thickness ratios (a) α = 10;(b) α = 16;(c) α = 20;(d) α = 26;(e) α = 32;(1)lower surface of specimen under tension; (2) upper surface of specimen under compression

    图  3  不同跨厚比的单向板破坏时跨距中点的层间剪应力

    Figure  3.  Interlaminar shear stress at the span midpoint of unidirectional plates with different span-thickness ratios

    图  4  单向板的弯曲强度与跨厚比的关系

    Figure  4.  Relationship between the bending strength and the span-thickness ratio of a unidirectional plate

    图  5  基于实验数据改进Hashin准则的拟合结果

    Figure  5.  Improving fitting results of Hashin criterion based on experimental data

    表  1  单向板力学性能

    Table  1.   Mechanical properties of unidirectional plate

    Xt /MPaXc /MPaYt /MPaYc /MPaS12 /MPaS13 /MPa
    1961121673.322365.794
    下载: 导出CSV

    表  2  不同跨厚比试样的弯曲强度及破坏载荷下对应的层间剪应力

    Table  2.   Bending strength with different span-to-thickness ratios and corresponding interlaminar shear stress under failure load

    Span-thickness ratioAverage value of failure load /NBending strength /MPaInterlaminar shear stress
    at fracture /MPa
    101943.33±89.751359.70±39.8569.19±2.03
    161838.33±81.732064.00±123.9366.46±4.02
    201595.00±106.582351.85±179.7557.37±3.84
    261221.67±67.932506.52±166.6543.10±2.58
    32 936.50±75.752612.28±179.1732.88±1.87
    下载: 导出CSV

    表  3  不同跨厚比的复合材料弯曲模量

    Table  3.   Bending modulus of composite materials with different span-thickness ratios

    Span-thickness
    ratio
    Bending
    modulus /GPa
    Coefficient of
    variation /%
    1059.25±4.518.32
    1672.38±3.565.40
    2074.05±4.486.60
    2668.60±2.493.95
    3266.75±2.814.64
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-07-14
  • 修回日期:  2021-08-17
  • 网络出版日期:  2022-03-14
  • 刊出日期:  2022-04-22

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