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Heating characterization of the thickness-through fatigue crack in metal plate using sonic IR imaging

机译：声波红外成像对金属板厚度贯穿疲劳裂纹的加热特性

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摘要

In sonic IR imaging, a major problem is exploring the heating characteristics of crack vicinity to guide the optimization of the test conditions. In this paper, the crack's heating characteristics of the metallic plate with an artificial fatigue crack has been studied. Experimental results showed that the during ultrasonic excitation the temperature rise of crack vicinity at the plate's excitation side is higher than that at its opposite side, whereas the total heating efficiency of the crack face appears to be stable. Through the profile mapping of the crack face, the frictional heating is mainly concentrated near the excitation side. Based on this phenomenon, we built a mathematical heat transfer model to calculate the temperature distribution of the crack vicinity and investigated the heating features of crack faces. Additionally, the mathematical model gives a quantitative relation between the depth of the heat source and the ratio of the temperature distribution of the crack vicinity at opposite side to that at the front side. This study aims to provide a quantitative evaluation method for locating the frictional heating areas in sonic IR imaging.
机译：在声波红外成像中，主要问题是探索裂纹附近的加热特性，以指导优化测试条件。本文研究了具有人工疲劳裂纹的金属板的裂纹加热特性。实验结果表明，在超声激发过程中，板的激发侧裂纹附近的温升高于其相反侧，而裂纹面的总加热效率似乎是稳定的。通过裂纹面的轮廓映射，摩擦加热主要集中在激励侧附近。基于这种现象，我们建立了数学传热模型来计算裂纹附近的温度分布，并研究了裂纹面的加热特性。另外，该数学模型给出了热源深度与相对于前侧的裂纹附近的温度分布的比率之间的定量关系。这项研究旨在提供一种定量评估方法，用于定位声波红外成像中的摩擦加热区域。

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  • 来源
    《NDT & E international》 |2017年第4期|38-43|共6页
  • 作者

    Fu-zhou Feng; Chao-sheng Zhang; Qing-xu Min; Jun-zhen Zhu; Wei-jie Wang; Xu Chao;

  • 作者单位

    Key laboratory of Nondestructive Testing, Ministry of Education, Nanchang, China,Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing, China;

    Engineer Academy of PLA, Xuzhou, China;

    Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing, China;

    Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing, China;

    Peking University, Beijing, China;

    Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sonic IR imaging; Metallic plate; Thickness-through fatigue crack; Crack heating; Heat transfer model;

    机译：声波红外成像;金属板;通过疲劳裂纹的厚度;裂纹加热;传热模型;

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