Detection of defects in a 2D fluid-solid periodic cluster
Language
en
Article de revue
This item was published in
Ultrasonics. 2021, vol. 112, p. 1-11
Elsevier
English Abstract
The present work deals with locating a defect buried in a medium composed of a fluid matrix and small solid inhomogeneities. Classical imaging methods are based on delay and sum principle and would implicitly assume that ...Read more >
The present work deals with locating a defect buried in a medium composed of a fluid matrix and small solid inhomogeneities. Classical imaging methods are based on delay and sum principle and would implicitly assume that the undamaged medium is homogeneous. The topological imaging framework however allows to take into account the heterogeneous nature of the undamaged medium and potentially to take advantage of it. In this work, it is applied to a demanding test case with different assumptions on the knowledge of the medium properties using a specifically-designed fluid-solid compatible imaging function. It leads to the definition of three imaging processes whose results are compared using respectively synthetic and experimental data. The results show the relevance of using the inhomogeneities' locations information, but not necessarily at all steps of the imaging process, leading to the definition of so called hybrid topological imaging method.Read less <
English Keywords
Nondestructive Testing
Ultrasonic Waves
Topological Imaging
Heterogeneous Medium
Multiple scattering
Periodic Cluster
Origin
Hal imported