Determination of the acoustic nonlinearity parameter B/A with low-frequency sound

2010 ◽  
Author(s):  
Yi Zhang ◽  
Hui Sun ◽  
Guangping Zhu
Keyword(s):  
Low Frequency ◽  
Nonlinearity Parameter ◽  
Frequency Sound ◽  
Acoustic Nonlinearity Parameter ◽  
Acoustic Nonlinearity

scholarly journals Experimental and Numerical Study of Nonlinear Lamb Waves of a Low-Frequency S0 Mode in Plates with Quadratic Nonlinearity

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2096 ◽  
Author(s):  
Xiangyan Ding ◽  
Youxuan Zhao ◽  
Ning Hu ◽  
Yaolu Liu ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Lamb Waves ◽  
Numerical Study ◽  
Low Frequency ◽  
Nonlinear Behavior ◽  
Quadratic Nonlinearity ◽  
Nonlinearity Parameter ◽  
Experimental Measurements ◽  
Weak Nonlinearity ◽  
Acoustic Nonlinearity Parameter ◽  
Acoustic Nonlinearity

This paper investigates the propagation of low-frequency S0 mode Lamb waves in plates with quadratic nonlinearity through numerical simulations and experimental measurements. Both numerical and experimental results manifest distinct ultrasonic nonlinear behavior which is mainly presented by the second harmonics. Meanwhile, we find that both the acoustic nonlinearity parameter and dispersion distance show the exponential decay trend with the increase of frequency-thickness. Moreover, the results reveal that the frequency is key to affect the acoustic nonlinearity parameter and dispersion distance with the same frequency-thickness. This study theoretically and experimentally reveals that nonlinear Lamb waves of the low-frequency S0 mode are feasible to quantitatively identify material weak nonlinearity in plates.

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