Anisotropic Behavior Analyzed by Laser-Generated Lamb Waves for Fiber Composite Plates

程建春; 韩俊波; 张淑仪; Yves Berthelot

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Anisotropic Behavior Analyzed by Laser-Generated Lamb Waves for Fiber Composite Plates

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Analyses of the anisotropic behavior of a Uber composite plate from the laser-generated ultrasonic Lamb waveforms propagating in different directions are presented by employing wavelet transform techniques.The time-frequency representation plots of the waveforms clearly exhibit the anisotropic behavior of the composite plate.The plots also indicate that the waveform mainly consists of three or four lower-order Lamb wave modes,and other higher-order modes can be neglected in extracting elastic stiffness properties by comparison of theory with experimental waveforms.The group velocity of each mode is calculated according to the group delay and the source-receiver distance.

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《中国物理快报：英文版》 |1999年第7期|P.518-519|共2页
作者
程建春; 韩俊波; 张淑仪; Yves Berthelot;
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作者单位

Laboratory of Modern Acoustics and Institute of Acoustics Nanjing University Nanjing 210093;

Laboratory of Modern Acoustics and Institute of Acoustics Nanjing University Nanjing 210093;

Laboratory of Modern Acoustics and Institute of Acoustics Nanjing University Nanjing 210093;

School of Mechanical Engineering Georgia Institute of Technology^Atlanta GA 30332 USA;

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原文格式 PDF
正文语种 chi
中图分类工程材料学;
关键词
composite; anisotropic; neglected;

Anisotropic Behavior Analyzed by Laser-Generated Lamb Waves for Fiber Composite Plates

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