Localization of material defects using nonlinear resonant ultrasound spectroscopy under asymmetric boundary conditions

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• 作者：Xiaozhou Liu ; Zhou Dao ; Jinlin Zhu ; Wenxin Qu ; Xiufen Gong ; Koen Van Den Abeele ; Li Ma
• 关键词：Defect imaging ; Nonlinear elasticity ; Resonant ultrasound spectroscopy
• 刊名：Physics Procedia
• 出版年：2010
• 出版时间：1 January 2010
• 年：2010
• 卷：3
• 期：1
• 页码：55-61
• 全文大小：384 K

文摘

The position of microscopic defects in a one-dimensional bar is analyzed by means of the nonlinear resonant ultrasound spectroscopy technique under asymmetric boundary conditions. Experimental results on cementitious material confirm the feasibility of the method to locate nonlinear scatterers. Good agreement between the real damage position and the inferred experimental prediction is obtained based on information about the nonlinear frequency shift and about the amplitude ratio of the third and fifth harmonic for the fundamental resonance mode.