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首页> 外文期刊>Materials Science and Engineering >Study of mechanical properties and cracking extension resistance behavior of C/SiC composites by single edge notched beam and digital image correlation techniques
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Study of mechanical properties and cracking extension resistance behavior of C/SiC composites by single edge notched beam and digital image correlation techniques

机译：C / SiC复合材料力学性能和抗开裂扩展性能的单边缺口梁和数字图像相关技术研究

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摘要

The carbon fiber reinforced silicon carbide matrix (C/SiC) composites were prepared by using precursor infiltration and pyrolysis method. Fracture characteristics of C/SiC materials were studied by single edge notched beam with the aid of digital image correlation (DIC) technique. It was found that DIC played an important role in in-situ monitoring full/local strain evolution and cracking growth during bending tests, which was useful for revealing potential failure micro-mechanisms of C/SiC composites. The results showed that the average fracture toughness K_(IC) and fracture strength of C/SiC were estimated as 7.81 ± 0.12 MPa m~(1/2) and 223.23 ± 3.5 MPa, respectively. Moreover, the crack extension resistance curves (R-curve) in terms of stress intensity (K_R-curves) were determined on the basis of the crack initiation toughness K_(IC). The values varied from 4.68 MPa m~(1/2) to 16.83 MPa m~(1/2) during the R-curve tests.
机译：碳纤维增强的碳化硅基（C / SiC）复合材料是通过前体浸渗和热解法制备的。借助数字图像相关技术（DIC），利用单边缘切口光束研究了C / SiC材料的断裂特性。结果发现，DIC在弯曲试验过程中现场监测全应变/局部应变的发展和裂纹扩展方面起着重要作用，这对于揭示C / SiC复合材料的潜在破坏微观机制很有用。结果表明，C / SiC的平均断裂韧性K_（IC）和断裂强度分别为7.81±0.12 MPa m〜（1/2）和223.23±3.5 MPa。此外，基于裂纹萌生韧性K_（IC），确定了基于应力强度（K_R-曲线）的抗裂纹扩展曲线（R-曲线）。在R曲线测试期间，该值从4.68 MPa m〜（1/2）到16.83 MPa m〜（1/2）不等。

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  • 来源
    《Materials Science and Engineering》 |2016年第1期|222-228|共7页
  • 作者

    W.G. Mao; J. Chen; M.S. Si; R.F. Zhang; Z.B. Peng; C.Y. Dai; Q.S. Ma; D.N. Fang;

  • 作者单位

    School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China,Key Laboratory of Film Materials and Devices of Science and Technology, Department of Hunan Province, Xiangtan University, Hunan 411105, China;

    School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China,Key Laboratory of Film Materials and Devices of Science and Technology, Department of Hunan Province, Xiangtan University, Hunan 411105, China;

    School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China,Key Laboratory of Film Materials and Devices of Science and Technology, Department of Hunan Province, Xiangtan University, Hunan 411105, China;

    School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China,Key Laboratory of Film Materials and Devices of Science and Technology, Department of Hunan Province, Xiangtan University, Hunan 411105, China;

    School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China,Key Laboratory of Film Materials and Devices of Science and Technology, Department of Hunan Province, Xiangtan University, Hunan 411105, China;

    School of Materials Science and Engineering, Xiangtan University, Hunan 411105, China,Key Laboratory of Film Materials and Devices of Science and Technology, Department of Hunan Province, Xiangtan University, Hunan 411105, China;

    Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, PR China;

    State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    C/SiC composite; Mechanical properties; Bending test; Digital image correlation;

    机译：C / SiC复合材料;机械性能弯曲测试;数字图像关联;

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