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首页> 外文期刊>Applied Acoustics >An experimental study on the behavior of A_o mode transduced using misaligned air-coupled transducers in composite laminates
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An experimental study on the behavior of A_o mode transduced using misaligned air-coupled transducers in composite laminates

机译：错位空气耦合换能器在复合材料叠层中A_o模式行为的实验研究

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摘要

Air-coupled transducers can be employed for generation and reception of Lamb waves in composite laminates. To generate and receive a particular Lamb mode, the transducers are oriented in a particular angle. The orientations of transducers also determine amplitude of a particular Lamb mode of interest. Any deviation (misalignment) from the right orientation results in a reduction in the amplitude. Therefore, an attempt has been made to establish variation in amplitude of the fundamental anti-symmetric Lamb mode (A_o) when misalignments were purposefully introduced in the air-coupled probes. In the present work, three different misalignments - linear, orientation and" synchronized orientation were envisaged. Experiments were performed on two laminates - unidirectional ([0_3]_s) and cross-ply ([0/90_2/0]_s) of GFRP (Glass Fiber Reinforced Plastic) material. Curves were fitted on experimental data to characterize variation in amplitude of A_o mode in each misalignment. Moreover, wave splitting and merging was observed when the probe(s) was (were) rotated in a particular direction in orientation and synchronized orientation misalignments.
机译：空气耦合换能器可用于复合层压板中兰姆波的产生和接收。为了产生和接收特定的兰姆模式，换能器以特定的角度定向。换能器的方向还确定感兴趣的特定Lamb模式的幅度。与正确方向的任何偏差（未对准）都会导致振幅减小。因此，当在空气耦合探头中故意引入未对准时，已经尝试建立基本反对称Lamb模式（A_o）的幅度变化。在目前的工作中，设想了三种不同的错位-线性，取向和“同步取向”。对两种层压材料进行了实验-GFRP的单向（[0_3] _s）和交叉（[0 / 90_2 / 0] _s）（玻璃纤维增​​强材料）：在实验数据上拟合曲线以表征每次未对准时A_o模式振幅的变化；此外，当探头沿特定方向旋转时，观察到波分裂和合并。以及同步的方向偏移。

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  • 来源
    《Applied Acoustics》 |2014年第9期|141-149|共9页
  • 作者

    C. Ramadas; Avinash Hood; Irfan Khan; Krishnan Balasubramaniam; Makarand Joshi;

  • 作者单位

    Composites Research Center, R & D E (E), DRDO, Dighi, Pune 411 015, India;

    Composites Research Center, R & D E (E), DRDO, Dighi, Pune 411 015, India;

    Composites Research Center, R & D E (E), DRDO, Dighi, Pune 411 015, India;

    Center for Non-destructive Evaluation, Dept. of Mechanical Engineering, Indian Institute of Technology Madras, Chennai 600 036, India;

    Composites Research Center, R & D E (E), DRDO, Dighi, Pune 411 015, 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 probes; A_o mode; Misalignment; Composite laminate;

    机译：空气耦合探头A_o模式;错位;复合层压板;

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