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首页> 外文期刊>NDT & E international >Lamb wave based ultrasonic imaging of interface delamination in a composite T-joint
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Lamb wave based ultrasonic imaging of interface delamination in a composite T-joint

机译：基于兰姆波的复合T型接头界面分层超声成像

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摘要

In this article, the complete characterization of the interface delamination in a composite T-joint using ultrasonic guided Lamb waves is discussed. Correlation between the numerically simulated and experimentally obtained B-scans was established. In the B-scan images, different Zones were identified and could be utilized for differentiating the healthy and delaminated T-joints. The length and the width of delamination were computed from traversing the transducers in two orthogonal directions (i.e. called the B-scans, and the D-scans). For the first time, backward propagating mode (called "Turning Lamb Modes") that are generated at corner of the T-joint was observed and verfied. Using a single linear line scan of the "Turning Lamb Modes", both the width and length of interface delamination could be computed. In the present study, the experiments were carried out employing air-coupled ultrasonic transducers.
机译：在本文中，讨论了使用超声导引的兰姆波对复合T形接头中界面分层的完整表征。建立了数值模拟和实验获得的B扫描之间的相关性。在B扫描图像中，可以识别出不同的区域，并可以用来区分健康的和分层的T型关节。分层的长度和宽度是通过沿两个正交方向（即称为B扫描和D扫描）遍历换能器来计算的。首次观察并验证了在T型接头拐角处产生的向后传播模式（称为“转向羔羊模式”）。使用“ Turn Lamb Modes”的单条线性扫描，可以计算出界面分层的宽度和长度。在本研究中，实验是使用空气耦合超声换能器进行的。

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  • 来源
    《NDT & E international》 |2011年第6期|p.523-530|共8页
  • 作者

    C. Ramadas; Janardhan Padiyar; Krishnan Balasubramaniam; Makarand Joshi; C.V. Krishnamurthy;

  • 作者单位

    Composite Research Centre, R & D E (E), Pune 411015, India;

    Centre for Non-destructive Evaluation and Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;

    Centre for Non-destructive Evaluation and Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;

    Composite Research Centre, R & D E (E), Pune 411015, India;

    Centre for Non-destructive Evaluation and Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600036, India,Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India;

  • 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

    air-coupled ultrasound; finite element method; guided waves; turning lamb modes; ultrasonic imaging; composite materials;

    机译：空气耦合超声;有限元法;导波;转羊羔模式;超声成像;复合材料;

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