caa a22 4500 475843150 CHVBK 20180406123906.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1006616124565 doi (NATIONALLICENCE)springer-10.1023/A:1006616124565 Ultrasonic Self-Focusing on the Edge of a Surface-Breaking Crack: Experiment and Modeling [Elektronische Daten] [Ming Zhang, Jan Achenbach, Ansheng Cheng] An adaptive time-delay self-focusing technique has been used to focus ultrasound on the edge (tip) of a surface-breaking crack emanating from the opposite side of a plate. The diffraction of the focused signal has been measured with the array. Simulation of the self-focusing process and the diffraction by the crack edge has been carried out to obtain numerical results for the edge diffraction. Ray tracing has been used to determine the incident wave field in the plate. Comparisons between the numerical results and the measured data show good agreement. The results have been used to determine the depth of the crack. Plenum Publishing Corporation, 2000 ultrasonic self-focusing nationallicence array nationallicence surface-breaking crack nationallicence edge of a crack nationallicence Zhang Ming Sun Microsystems, 501 E. Middlefield, MV20, 94043, Mountain View, California aut Achenbach Jan Center for Quality Engineering and Failure Prevention, Northwestern University, 60208, Evanston, Illinois aut Cheng Ansheng Center for Quality Engineering and Failure Prevention, Northwestern University, 60208, Evanston, Illinois aut Journal of Nondestructive Evaluation Kluwer Academic Publishers-Plenum Publishers 19/1(2000-03-01), 33-42 0195-9298 19:1<33 2000 19 10921 https://doi.org/10.1023/A:1006616124565 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1006616124565 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Ming Sun Microsystems, 501 E. Middlefield, MV20, 94043, Mountain View, California aut NATIONALLICENCE 700 1- Achenbach Jan Center for Quality Engineering and Failure Prevention, Northwestern University, 60208, Evanston, Illinois aut NATIONALLICENCE 700 1- Cheng Ansheng Center for Quality Engineering and Failure Prevention, Northwestern University, 60208, Evanston, Illinois aut NATIONALLICENCE 773 0- Journal of Nondestructive Evaluation Kluwer Academic Publishers-Plenum Publishers 19/1(2000-03-01), 33-42 0195-9298 19:1<33 2000 19 10921 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer