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原位聚合碳纤维增强聚甲基丙烯酸甲酯基复合材料损伤与修复研究

龚明 张代军 张嘉阳 付善龙 李军 陈祥宝

龚明, 张代军, 张嘉阳, 等. 原位聚合碳纤维增强聚甲基丙烯酸甲酯基复合材料损伤与修复研究[J]. 复合材料学报, 2022, 40(0): 1-11
引用本文: 龚明, 张代军, 张嘉阳, 等. 原位聚合碳纤维增强聚甲基丙烯酸甲酯基复合材料损伤与修复研究[J]. 复合材料学报, 2022, 40(0): 1-11
Ming GONG, Daijun Zhang, Jiayang Zhang, Shanlong Fu, Jun Li, Xiangbao Chen. Damage and repair study of in-situ polymerized carbon fiber reinforced PMMA composites[J]. Acta Materiae Compositae Sinica.
Citation: Ming GONG, Daijun Zhang, Jiayang Zhang, Shanlong Fu, Jun Li, Xiangbao Chen. Damage and repair study of in-situ polymerized carbon fiber reinforced PMMA composites[J]. Acta Materiae Compositae Sinica.

原位聚合碳纤维增强聚甲基丙烯酸甲酯基复合材料损伤与修复研究

基金项目: 国家重点研发项目(2020 YFC1910203)
详细信息
    通讯作者:

    张代军,博士,研究员,研究方向为树脂基复合材料  E-mail:15810534483@139.com

  • 中图分类号: TB332

Damage and repair study of in-situ polymerized carbon fiber reinforced PMMA composites

  • 摘要: 基于热塑性复合材料易修复的特性,开展了碳纤维增强PMMA(聚甲基丙烯酸甲酯)基复合材料修复技术研究。研究了工艺温度、压力和时间对复合材料力学性能的影响规律。结果表明,在200℃,0.75 MPa压力下保持10分钟可以获得优化的复合材料力学性能。引入低速冲击损伤,使用热压修复工艺修复碳纤维增强PMMA基复合材料损伤。通过X射线断层扫描测试、超声波无损检测技术和断面摄像方法评估了此复合材料的损伤行为和修复效果。结果表明,低速冲击对碳纤维增强PMMA基复合材料的损伤分为低变形量区域的纵向开裂与分层和高变形量区域的纤维断裂与基体失效的混合模式。碳纤维增强PMMA基复合材料损伤试样经过热压修复后,损伤外形恢复良好,损伤区域显著减少,内部的开裂和分层等损伤恢复良好,复合材料压缩强度从140 MPa恢复至263 MPa,达到未损伤复合材料压缩性能(307 MPa)的85.7%。

     

  • 图  1  试样支撑框(左);热压修复工艺(右)

    Figure  1.  Support frame of samples(left). Hot press repair process(right)

    图  2  PMMA树脂基体Tg(左),PMMA基复合材料Tg(右)

    Figure  2.  Tg of PMMA resin(left), Tg of PMMA composite(right)

    图  3  PMMA树脂基体流变测试结果

    Figure  3.  Rheological test results of PMMA resins

    图  4  处理压力为0.75 MPa时,PMMA基复合材料强度与处理温度关系

    Figure  4.  Relationship between the strength of PMMA composites and the treatment temperature under 0.75 MPa

    图  5  处理温度为200℃时,PMMA基复合材料强度与处理压力关系

    Figure  5.  Relationship between the strength of PMMA composites and the treatment pressure under 200℃

    图  6  碳纤维增强PMMA基复合材料修复前(左);修复后(右)

    Figure  6.  Carbon fiber reinforced PMMA composites before repair(left), after repair(right)

    图  7  碳纤维增强PMMA基复合材料损伤状态修复前(左);修复后(右)

    Figure  7.  Damage conditions of CF reinforced PMMA composites before repair(left), after repair(right)

    图  8  冲击损伤PMMA基复合材料试样修复前后横截面CT扫描结果对比

    Figure  8.  Comparison of cross section CT scan results before and after repair of impact damaged PMMA composites samples

    图  9  冲击损伤试样修复前后PMMA基复合材料厚度方向截面CT扫描结果对比

    Figure  9.  Comparison of CT scan results of thickness direction section of PMMA composites before and after impact damage repair

    图  10  修复前后PMMA基复合材料内部缺陷分布区域

    Figure  10.  Defect area of PMMA composites before and after repair

    图  11  碳纤维增强PMMA基复合材料试样不同损伤部位修复后取样图

    Figure  11.  Diagrams of different damaged parts of CF reinforced PMMA composite samples after repair

    图  12  碳纤维增强PMMA基复合材料不同损伤部位缺陷取样图

    Figure  12.  Defect sampling diagram of CF reinforced PMMA composites at different injury sites

    图  13  碳纤维增强PMMA基复合材料冲击后分层缺陷

    Figure  13.  Post-impact delamination defects of CF reinforced PMMA composites

    图  14  碳纤维增强PMMA基复合材料纵向开裂与分层缺陷的伴随出现形貌

    Figure  14.  The concomitant morphology of longitudinal cracking and delamination defects in composites

    图  15  未冲击试样、冲击损伤试样与修复后PMMA基复合材料试样压缩强度对比

    Figure  15.  Comparison of compressive strength of unimpacted, damaged, and repaired PMMA composite samples

    图  16  损伤后修复PMMA基复合材料试样冲击后压缩破坏形貌

    Figure  16.  Compression failure morphology of PMMA composites after impact damage was repaired

    图  17  损伤和修复PMMA基复合材料冲击后压缩强度曲线

    Figure  17.  Compressive strength curves of damaged and repaired PMMA composites after impact

    表  1  整体成型与粘接PMMA基复合材料试样修复结果对比

    Table  1.   Comparison of repair results between one-piece and bonded PMMA composite samples

    Treatment processBending strength/MPaBending modulus/GPaShort-beam shear strength/MPa
    one-piecebondedone-piecebondedone-piecebonded
    0.1 MPa/ 180℃/ 10 min56550347.341.937.140.9
    0.1 MPa/ 200℃/ 10 min22413634.925.920.419.7
    0.4 MPa/ 200℃/ 10 min70850139.544.152.647.5
    0.75 MPa/ 160℃/ 10 min70061954.546.154.119.0
    0.75 MPa/ 180℃/ 10 min72269650.944.452.242.9
    0.75 MPa/ 200℃/ 10 min69363950.244.250.146.1
    0.75 MPa/ 220℃/ 10 min19429838.236.614.523.8
    1.0 MPa/ 180℃/ 10 min68462843.838.453.353.5
    1.0 MPa/ 200℃/ 10 min64252544.137.849.950.2
    1.0 MPa/ 200℃/ 30 min鼓包鼓包鼓包鼓包鼓包鼓包
    下载: 导出CSV

    表  2  PMMA基复合材料修复前后试样厚度

    Table  2.   Thicknesses of PMMA composite samples before and after repair

    before/mmafter/mm
    13.994.02
    23.974.00
    33.984.00
    44.024.03
    Avg.3.994.01
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-03-18
  • 录用日期:  2022-05-03
  • 修回日期:  2022-04-19
  • 网络出版日期:  2022-05-23

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