Absolute measurement of ultrasonic non-linearity parameter at contact interface

作者：Yuan Maodan; Lee Taekgyu; Kang To; Zhang Jianhai; Song Sung Jin^*; Kim Hak Joon

来源：Nondestructive Testing And Evaluation, 2015, 30(4): 356-372.

DOI：10.1080/10589759.2015.1041523

• contact interface
• absolute measurement
• non-linear ultrasonic
• piezoelectric detection method

Non-linear interaction of waves with contact interfaces has been widely applied in non-destructive evaluation fields such as bonding quality evaluation, and the detection of closed microcracks and composite delamination. This paper proposes an absolute measurement of the ultrasonic non-linearity parameter using a piezoelectric detection method for two aluminum alloy blocks of different lengths. The results of a two-dimensional finite element method model verified by models for hard and soft contact interfaces, depending on the interface property, were compared with the measured non-linearity parameter. The measured values show good agreement with the modelled results, indicating good potential for measuring the non-linearity parameter at interfaces experimentally and numerically.

• 出版日期2015-10-2