Translated Title
Defect Imaging of Composite Plate Considering Group Velocity Anisotropy of Lamb Waves
Translated Abstract
Lamb wave inspection method is proposed based on distributed transducer array for composite inspection and defect imaging.In experiments, group velocity distribution of So mode in different propagation directions is measured in a quasi-isotropic composite plate.Defect inspection in the composite plate is carried out by using distributed transducer array.Discrete ellipse imaging to an artificial defect is also implemented by using uniform group velocity and anisotropic group velocity distribution.Research results show that the location precision of defect imaging in composite plate can be effectively improved by considering the anisotropy of group velocity of Lamb waves.
Translated Keyword
Lamb waves
Ellipse imaging
Composite plate
Group velocity
Anisotropy
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