Defect localization by an extended laser source on a hemisphere

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Veira Canle , D , Mäkinen , J M K , Blomqvist , R , Gritsevich , M , Salmi , A & Haeggström , E 2021 , ' Defect localization by an extended laser source on a hemisphere ' , Scientific Reports , vol. 11 , no. 1 , 15191 . https://doi.org/10.1038/s41598-021-94084-w

Title: Defect localization by an extended laser source on a hemisphere
Author: Veira Canle, Daniel; Mäkinen, Joni Mikko Kristian; Blomqvist, Richard; Gritsevich, M.; Salmi, Ari; Haeggström, Edward
Contributor: University of Helsinki, Doctoral Programme in Materials Research and Nanosciences
University of Helsinki, Materials Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Doctoral Programme in Particle Physics and Universe Sciences
Date: 2021-07-26
Language: eng
Number of pages: 7
Belongs to series: Scientific Reports
ISSN: 2045-2322
URI: http://hdl.handle.net/10138/333294
Abstract: The primary goal of this study is to localize a defect (cavity) in a curved geometry. Curved topologies exhibit multiple resonances and the presence of hotspots for acoustic waves. Launching acoustic waves along a specific direction e.g. by means of an extended laser source reduces the complexity of the scattering problem. We performed experiments to demonstrate the use of a laser line source and verified the experimental results in FEM simulations. In both cases, we could locate and determine the size of a pit in a steel hemisphere which allowed us to visualize the defect on a 3D model of the sample. Such an approach could benefit patients by enabling contactless inspection of acetabular cups.
Subject: 114 Physical sciences
Engineering
Materials Science
physics
ACOUSTIC-WAVE PROPAGATION
LAMB WAVE
CIRCUMFERENTIAL WAVES
MECHANICAL-PROPERTIES
GUIDED-WAVES
SCATTERING
GENERATION
CYLINDER
HOLE
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