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高温下多轴向拉挤复合材料面内抗剪性能

张玲峰 李钱怿 曹大富 刘伟庆 王琨

张玲峰, 李钱怿, 曹大富, 等. 高温下多轴向拉挤复合材料面内抗剪性能[J]. 复合材料学报, 2021, 39(0): 1-9
引用本文: 张玲峰, 李钱怿, 曹大富, 等. 高温下多轴向拉挤复合材料面内抗剪性能[J]. 复合材料学报, 2021, 39(0): 1-9
Lingfeng ZHANG, Qianyi LI, Dafu CAO, Weiqing LIU, Kun WANG. In-plane shear properties of multi-axial pultruded composites at elevated temperatures[J]. Acta Materiae Compositae Sinica.
Citation: Lingfeng ZHANG, Qianyi LI, Dafu CAO, Weiqing LIU, Kun WANG. In-plane shear properties of multi-axial pultruded composites at elevated temperatures[J]. Acta Materiae Compositae Sinica.

高温下多轴向拉挤复合材料面内抗剪性能

基金项目: 国家自然科学基金(51238003, 52108253);江苏省“双创博士”(JSSCBS20211064)
详细信息
    通讯作者:

    张玲峰,博士,讲师,硕士生导师,研究方向为纤维增强复合材料的高温力学性能 E-mail:lfzhang@yzu.edu.cn

In-plane shear properties of multi-axial pultruded composites at elevated temperatures

  • 摘要: 为研究纤维布、剪切面、温度对多轴向拉挤复合材料抗剪性能的影响,对短切毡(剪切面垂直于或平行于纤维方向)增强的传统拉挤复合材料以及90°单轴布和±45°/90°三轴布增强的多轴向拉挤复合材料,进行了常温及高温下的面内抗剪试验。结果表明,破坏模式主要为斜对角方向的微屈曲、脱层和剪切失效,并取决于纤维布和剪切面。纤维布对抗剪性能有着重要影响,常温下三轴布增强试件的平均抗剪强度为67.5 MPa,远远好于单轴布及短切毡增强试件(44.4 MPa和45.2 MPa)。剪切面对抗剪性能有一定的影响,常温下剪切面垂直于纤维方向的短切毡增强试件的平均抗剪强度好于平行于纤维方向的强度(38.9 MPa)。然而,随着温度的升高,各组试件的抗剪性能迅速降低,同时各组抗剪性能的差异也逐渐减小。基于热动力学理论和并联定律的单向复合材料抗剪性能计算模型总体上也适用于多轴向拉挤复合材料。最后,在相关试验的基础上提出了适用于高温下多轴向拉挤复合材料抗剪强度、剪切模量的计算公式。研究结果可为高温下的多轴向拉挤复合材料抗剪设计提供依据。

     

  • 图  1  多轴向E6386T级玻璃纤维布

    Figure  1.  Multi-axial E6386T glass fiber mat

    CSM-Chopped strand mat; UM-Uniaxial mat; TM-Triaxial mat

    图  2  剪切试验装置 (单位:mm)

    Figure  2.  Experimental shearing device (Unit: mm)

    图  3  CSM结构E6386T玻璃单丝/EL-400不饱和聚酯多轴向拉挤复合材料热分析试验结果

    Figure  3.  Thermal analysis results of CSM structure E6386T glass fiber/EL-400 unsaturated polyester multi-axial pultruded composites

    图  4  E6386T玻璃单丝/EL-400不饱和聚酯多轴向拉挤复合材料剪切破坏模式

    Figure  4.  Shear failure modes of E6386T glass fiber/EL-400 unsaturated polyester multi-axial pultruded composites

    图  5  E6386T玻璃单丝/EL-400不饱和聚酯多轴向拉挤复合材料剪应力-剪应变曲线

    Figure  5.  Shear stress-strain curves of E6386T glass fiber/EL-400 unsaturated polyester multi-axial pultruded composites

    图  6  E6386T玻璃单丝/EL-400不饱和聚酯多轴向拉挤复合

    材料抗剪强度

    Figure  6.  Shear strength of E6386T glass fiber/EL-400 unsaturated polyester multi-axial pultruded composites

    图  7  E6386T玻璃单丝/EL-400不饱和聚酯多轴向拉挤复合材料剪切模量

    Figure  7.  Shear modulus of E6386T glass fiber/EL-400 unsaturated polyester multi-axial pultruded composites

    图  8  不同文献中玻璃纤维/不饱和聚酯复合材料的归一化抗剪强度

    Figure  8.  Normalized shear strength of glass fiber/unsaturated polyester composites from different literatures

    图  9  玻璃纤维/不饱和聚酯复合材料的归一化试验值与公式计算值

    Figure  9.  Normalized experimental and calculated values of glass fiber/unsaturated polyester composites

    表  1  试验工况

    Table  1.   Test configurations

    IDReinforced fabricNumber of layersDensity/(kg.m−3)Shear planeTarget temperature/℃
    NTCSM31893Perpendicular to the fiber20, 40, 60, 80, 100, 120, 140, 180
    NPCSM31893Parallel to the fiber20, 40, 60, 80, 100, 120, 140, 180
    UTUM31836Perpendicular to the fiber20, 40, 60, 80, 100, 120, 140, 180
    TTTM31928Perpendicular to the fiber20, 40, 60, 80, 100, 120, 140, 180
    Notes: In specimen ID, the first letter: N-Chopped strand mat; U-Uniaxial mat; T-Triaxial mat; the second letter: T-Perpendicular to the fiber; P- Parallel to the fiber.
    下载: 导出CSV

    表  2  E6386T玻璃单丝/EL-400不饱和聚酯多轴向拉挤复合材料剪切强度、模量预测模型输入值

    Table  2.   Input parameters for prediction of shear properties of E6386T glass fiber/EL-400 unsaturated polyester multi-axial pultruded composites

    Strength retention rateModulus retention rate
    τg/τgτl/τgτd/τgGg/GgGl/GgGd/Gg
    1.000.090.011.000.080.01
    Notes: τ is the shear strength; G is the shear modulus; the subscripts g, l and d represent the glassy state, viscous state and decomposition state, respectively.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-11-01
  • 录用日期:  2021-11-30
  • 修回日期:  2021-11-26
  • 网络出版日期:  2021-12-31

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