Microstructure Effects of Ultrasonic Waves in a Fiber Reinforced Composite Plate

HAN Jun-Bo; TANG Li-Guo; CHENG Jian-Chun; Yves Berthelot

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Microstructure Effects of Ultrasonic Waves in a Fiber Reinforced Composite Plate

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The microstructure effect of ultrasonic waves in a unidirectional titanium graphite composite is analyzed by the mode energy conversions of the laser-generated ultrasonic Lamb wvaves. The carrying energy of each mode in the Lamb wvaves is calculated quantitatively by the time-frequency filtering technique of the Wigner distribution. We found that the energy conversions among modes have happened in the process of propagation of ultrasonic Lamb wave. These energy conversions are attributed to microstructure scattering of ultrasonic wave by the fibers in a fiber reinforced composite material. This work will provide a quantitative method of ultrasonic characterizationof microstructure feature of the composite materials by the laser-generated Lamb wave technique.

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《中国物理快报：英文版》 |2000年第10期|740-742|共3页
作者
HAN Jun-Bo; TANG Li-Guo; CHENG Jian-Chun; Yves Berthelot;
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The State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093rn;

The State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093rn;

The State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093;

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta GA30332-0405, USA;

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Microstructure Effects of Ultrasonic Waves in a Fiber Reinforced Composite Plate

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