![]() Jeong, H., Zhang, S., Li, X.: A novel method for extracting acoustic nonlinearity parameters with diffraction corrections. Hamilton, M., Blackstock, D.: Nonlinear Acoustics. 12, 1990–1995 (2001)Ĭhristopher, T.: Experimental investigation of finite amplitude distortion-based, second harmonic pulse echo ultrasonic imaging. Kourtiche, D., Allies, L., Chitnalah, A., Nadi, M.: Harmonic propagation of finite amplitude sound beams: comparative method in pulse echo measurement of nonlinear B/A parameter. Ultrasonics 87, 145–151 (2018)Ĭhitnalah, A., Kourtiche, D., Jakjoud, H., Nadi, M.: Pulse echo method for nonlinear ultrasound parameter measurement. Jeong, H., Zhang, S., Li, X.: Improvement of pulse-echo harmonic generation from a traction-free boundary through phase-shift of a dual element transducer. Jeong, H., Cho, S., Zhang, S., Li, X.: Acoustic nonlinearity parameter measurements in a pulse-echo setup with the stress-free reflection boundary. Jeong, H., Zhang, S., Barnard, D., Li, X.: A novel and practical approach for determination of the acoustic nonlinearity parameter using a pulse-echo method. Zhang, S., Li, X., Jeong, H., Cho, S., Hu, H.: Theoretical and experimental investigation of the pulse-echo nonlinearity acoustic sound fields of focused transducers. Saito, S.: Nonlinearly generated second harmonic sound in a focused beam reflected from free surface. 33, 205–215 (2014)Ĭhitnalah, A., Kourtiche, D., Allies, L., Nadi, M.: Nonlinear ultrasound parameter measurement in pulse echo mode including diffraction effect. Wave Motion 50, 146–161 (2013)īest, S.R., Croxford, A.J., Neild, S.A.: Pulse-echo harmonic generation measurements for non-destructive evaluation. 1, 117–140 (1966)īender, F.A., Kim, J.Y., Jacobs, L.J., Qu, J.: The generation of second harmonic waves in an isotropic solid with quadratic nonlinearity under the presence of a stress-free boundary. 27, 230–250 (2016)īuck, O., Thompson, D.O.: Relation of finite amplitude waves to third order elastic constants. Jeong, H., Zhang, S., Cho, S., Li, X.: Assessment of acoustic nonlinearity parameters using an optimized data-fitting method with multi-Gaussian beam model-based diffraction corrections. ![]() Jeong, H., Barnard, D., Cho, S., Zhang, S., Li, X.: Receiver calibration and the nonlinearity parameter measurement of thick solid samples with diffraction and attenuation corrections. Kim, J., Jhang, K.Y., Kim, C.: Dependence of nonlinear ultrasonic characteristic on second-phase precipitation in heat-treated Al 6061-T6 alloy. 34, 273 (2015)Ĭhakrapani, S.K., Barnard, D.: A calibration technique for ultrasonic immersion transducers and challenges in moving towards immersion based harmonic imaging. Matlack, K.H., Kim, J.Y., Jacobs, L.J., Qu, J.: Review of second harmonic generation measurement techniques for material state determination in metals. (ed.): Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation. The dual element transducer is applied to pulse-echo β measurements of aluminum alloy samples, and the results are found to be in good agreement with the through-transmission method. The theoretical derivation provides the received beam fields and the formula for β determination with all necessary corrections incorporating diffraction, attenuation and boundary reflection. This paper utilizes a dual element transducer for nonlinearity parameter ( β) measurements of solid specimens in the pulse-echo testing configuration. ![]() Recently, we have found through acoustic modeling and simulation that a dual element transducer composed of the annular ring emitter and the inner disk receiver improves the second harmonic generation in the pulse-echo mode with the stress-free boundary. This is the reason why the harmonic generation measurements in the study of nonlinear fluids and solids have been limited to the through-transmission setup. A planar stress-free boundary is known to destructively alter the nonlinear wave generation process including the second harmonic component.
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