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.
Highlights
IntroductionThe primary goal of this study is to localize a defect (cavity) in a curved geometry
The primary goal of this study is to localize a defect in a curved geometry
This practice is commonplace for inspection of p ipes[5, 8, 27, 28] and Lamb waves are commonly used to characterize spherical s hells[29]
Summary
The primary goal of this study is to localize a defect (cavity) in a curved geometry. Specific sample regions can be targeted by launching directed acoustic waves with extended laser sources[22, 25, 26] This practice is commonplace for inspection of p ipes[5, 8, 27, 28] and Lamb waves are commonly used to characterize spherical s hells[29]. We demonstrate how the acoustic field interacts with the cavity and we use this information to visualize the hole in a 3D model of the sample This approach removes the need for complex scanning techniques[30] and data interpretation based on mode c onversion[31]. Such a simple approach could assist in the inspection of acetabular cups by characterizing their adhesion as well as the integrity of their attachment points[32,33,34]
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