碳/碳复合材料中纤维束界面强度的测试方法
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摘要
为探究碳/碳(C/C)复合材料纤维束界面强度定量表征的测试方法,使用原位顶出仪器、Micro-CT和扫描电镜分析沥青基C/C复合材料中纤维束界面断裂过程,采用顶出法研究C/C复合材料中纤维束界面强度的测试方法。结果表明:试样厚度、支撑狭缝宽度和加载位移速度对纤维束界面强度测试结果影响比较大,顶出法得到的纤维束界面强度测试结果符合正态分布,根据界面强度测试结果的离散系数、平均值大小确定了纤维束界面强度较佳的测试条件。
This paper is intended to explore the testing method designed for quantitative characterization of the interfacial strength of fiber bundles in carbon/carbon( C/C) composites. The targeted research involves analyzing the interfacial fracture process of fiber bundles of pitch based C/C composites using in situ push-out apparatus,Micro-CT and scanning electron microscopy( SEM); and investigating the testing method for the interfacial strength of fiber bundles in C/C composites by push-out method.The results demonstrate that fiber bundle load consists of three forms: fiber bundle interface load,fiber bundle interface failure load,and fiber bundle push-out movement load; the thickness of the specimen,the width of the support slit and the velocity of the loading displacement have a great influence on the test results of the fiber bundle interface strength; the push-out method could provide the results of the interfacial strength test conforming to the normal distribution; and the analysis of the discrete coefficient and the average value of the test results of the interface strength under different test condition could enable the determination of the test conditions of fiber bundle interface strength.
This paper is intended to explore the testing method designed for quantitative characterization of the interfacial strength of fiber bundles in carbon/carbon( C/C) composites. The targeted research involves analyzing the interfacial fracture process of fiber bundles of pitch based C/C composites using in situ push-out apparatus,Micro-CT and scanning electron microscopy( SEM); and investigating the testing method for the interfacial strength of fiber bundles in C/C composites by push-out method.The results demonstrate that fiber bundle load consists of three forms: fiber bundle interface load,fiber bundle interface failure load,and fiber bundle push-out movement load; the thickness of the specimen,the width of the support slit and the velocity of the loading displacement have a great influence on the test results of the fiber bundle interface strength; the push-out method could provide the results of the interfacial strength test conforming to the normal distribution; and the analysis of the discrete coefficient and the average value of the test results of the interface strength under different test condition could enable the determination of the test conditions of fiber bundle interface strength.
引文
[1]杨芳红,綦育仕,王艳艳,等.高性能C/C复合材料制备工艺研究[J].现代技术陶瓷,2017,37(3):118.
[2]李贺军,陈苗苗,姚西媛,等.自愈合C/C复合材料的研究现状与展望[J].硅酸盐学报,2018,46(1):142-148.
[3]苏君明,周绍建,李瑞珍,等.工程应用C/C复合材料的性能分析与展望[J].新型炭材料,2015,30(2):106-113.
[4]Brandstetter J,Peterlik H,Kromp K,et al.A new fbre-bundle pull-out test to determine interface properties of a 2D-woven carbon/carbon composite[J].Composites Science and Technology,2003,63:653–660.
[5]Watanabe K,Kohyama A,Sato S,et al.Evaluation of interfacial shear strength of C/C composites by means of micro-indentation test[J].Materials Transactions,1996,137(5):1161-1165.
[6]黄玉东,朱惠光,孙文训,等.细编穿刺C/C复合材料不同层次界面特性研究[J].复合材料学报,2000,17(1):56-59.
[7]景介辉,黄玉东,刘丽,等.碳/碳复合材料纤维束/基体界面强度的表征[J].材料科学与工艺,2011,19(3):61-64.
[8]Kallas M N,Koss D A,Hann H T,et al.Interfacial stress state present a thin-slice fiber push-out test[J].J Mater Sci,1992,27(14):3821-3826.
[2]李贺军,陈苗苗,姚西媛,等.自愈合C/C复合材料的研究现状与展望[J].硅酸盐学报,2018,46(1):142-148.
[3]苏君明,周绍建,李瑞珍,等.工程应用C/C复合材料的性能分析与展望[J].新型炭材料,2015,30(2):106-113.
[4]Brandstetter J,Peterlik H,Kromp K,et al.A new fbre-bundle pull-out test to determine interface properties of a 2D-woven carbon/carbon composite[J].Composites Science and Technology,2003,63:653–660.
[5]Watanabe K,Kohyama A,Sato S,et al.Evaluation of interfacial shear strength of C/C composites by means of micro-indentation test[J].Materials Transactions,1996,137(5):1161-1165.
[6]黄玉东,朱惠光,孙文训,等.细编穿刺C/C复合材料不同层次界面特性研究[J].复合材料学报,2000,17(1):56-59.
[7]景介辉,黄玉东,刘丽,等.碳/碳复合材料纤维束/基体界面强度的表征[J].材料科学与工艺,2011,19(3):61-64.
[8]Kallas M N,Koss D A,Hann H T,et al.Interfacial stress state present a thin-slice fiber push-out test[J].J Mater Sci,1992,27(14):3821-3826.