Calculation of Wideband Ultrasonic Fields Radiated by Immersed Transducers into Solids Through Curved Interfaces

New Developments in Ultrasonic NDT Modeling in CIVA

“…The two main models developed over the past years at CEA have been presented in this review [1,[3][4][5]. Therefore, we will only recall their main characteristics and briefly indicate the underlying theories on which they are based.…”

“…The associated softwares are implanted in the CIVA system developed at CEA for processing and imaging multiple technique NDT data [2]. Champ-Sons [3,4] is dedicated to the prediction of ultrasonic fields radiated by arbitrary transducers. Mephisto [5] simulates the testing of a piece by transducer scanning in predicting the echo-structures arising from defects and piece boundaries.…”

Integrated Models of Ultrasonic Examination for NDT Expertise

“…The model adopted in Champ-Sons has been extensively described in this review [2][3][4]. Consequently we only briefly recall here the main features of the underlying theory.…”

“…Then the longitudinal and transverse components of the elastic field in the specimen are computed separately. Specific developments have been made to account for transmission at curved boundaries [4]. The case ofphased array transducers can be derived from the monolithic case by summing the contributions of all the active elements [5,6].…”

“…A first one, called Champ-Sons [2,3], is devoted to the computation of the uhrasonie fields radiated by arbitrary transducers into pieces under inspection. A second one, called Mephisto [4,5], simulates the examination by predicting the echo-structure for each scanning position of the probe.…”