... in reducing actual experimental trials, facilitate an understanding of the echo signatures, and help assess the crack depth. The profiles of the crack and the notch were verified through destructive assay of the samples and subsequent dye penetrant assisted physical measurements. 29 05 2009 10 09...

...Jian Li Ultrasonic guided waves have been used extensively for long-range pipe inspections. The technique is based on detecting the guided wave echoes reflected from pipe defects located at a remote distance. The axial location of the defect from the transducer can be determined by the arrival time...

... and circumferential directions. Using this calculation technique, echoes from the back wall beyond up to four elbows are discussed. 14 01 2005 24 01 2005 acoustic wave propagation pipes nondestructive testing finite element analysis echo Since guided waves can propagate over long...