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首页> 外文会议>Ceramic materials for energy applications II >CHARACTERIZATION OF FAILURE BEHAVIOR OF SILICON CARBIDE COMPOSITES BY ACOUSTIC EMISSION
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CHARACTERIZATION OF FAILURE BEHAVIOR OF SILICON CARBIDE COMPOSITES BY ACOUSTIC EMISSION

机译：声发射表征碳化硅复合材料的破坏行为

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摘要

A silicon carbide fiber reinforced silicon carbide matrix (SiC/SiC) composite is a promising candidate material for various nuclear applications such as a fusion blanket. Due to the inherent brittle-like failure, identifying failure scenario with consideration of reliability and reproducibility of composite's characteristics is undoubtedly important to develop design codes specialized for composites. This study aims to identify failure behavior of SiC/SiC composites by varied test modes. For this purpose, acoustic emission (AE) was applied to detect composites' failure. The tensile, compressive and in-plane shear tests were conducted for plain-weave (P/W) chemical-vapor-infiltration (CVI) SiC/SiC composites. Various loading angles were applied to discuss an anisotropic issue. AE results distinguished damage accumulation processes in axial and off-axial loading cases. Specifically, test results indicated a clear difference of damage density between tensile and compressive tests. This study also classified the characteristic failure modes by separately discussing localized variations of power within a lime series by wavelet analysis.
机译：碳化硅纤维增强的碳化硅基体（SiC / SiC）复合材料是有希望的候选材料，可用于诸如融合毯之类的各种核应用。由于固有的类脆性故障，考虑到复合材料特性的可靠性和可再现性来确定故障场景对于开发专用于复合材料的设计规范无疑是重要的。本研究旨在通过各种测试模式来确定SiC / SiC复合材料的失效行为。为此，声发射（AE）用于检测复合材料的失效。对平纹（P / W）化学气相渗透（CVI）SiC / SiC复合材料进行了拉伸，压缩和面内剪切测试。应用各种加载角度来讨论各向异性问题。声发射结果在轴向和离轴载荷情况下均具有明显的损伤累积过程。具体而言，测试结果表明拉伸和压缩测试的损伤密度存在明显差异。这项研究还通过小波分析分别讨论了石灰系列中的局部功率变化，从而对特征失效模式进行了分类。

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  • 会议地点 Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US)
  • 作者

    Takashi Nozawa; Kazumi Ozawa; Hiroyasu Tanigawa;

  • 作者单位

    Japan Atomic Energy Agency, 2-166 Omotedate, Obuchi, Rokkasho, Aomori 039-3212, Japan;

    Japan Atomic Energy Agency, 2-166 Omotedate, Obuchi, Rokkasho, Aomori 039-3212, Japan;

    Japan Atomic Energy Agency, 2-166 Omotedate, Obuchi, Rokkasho, Aomori 039-3212, Japan;

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