5:40 PM - 5:55 PM
[2A28-33-03] Identification of defects using topological derivatives for QNDE with laser measurement data
Keywords:QNDE, Laser ultrasonic, identification of defects, topological derivative
Identification of defects using topological derivatives for QNDE with laser measurement data is considered.
In previous studies of an identification of defects in an elastic material using topological derivatives, the topological derivatives are defined with the displacement vectors measured on the surface of the material.
However, only the normal component of the particle velocity on the surface is able to be obtained with the laser ultrasonic measurement.
In this study, topological derivatives are calculated using normal particle velocities on the surface of the material.
We solve a simple defect identification problem using the proposed topological derivatives.
We can show that the defects are determined with sufficient accuracy using the topological derivatives calculated with the normal component of the particle velocity on the surface.
In previous studies of an identification of defects in an elastic material using topological derivatives, the topological derivatives are defined with the displacement vectors measured on the surface of the material.
However, only the normal component of the particle velocity on the surface is able to be obtained with the laser ultrasonic measurement.
In this study, topological derivatives are calculated using normal particle velocities on the surface of the material.
We solve a simple defect identification problem using the proposed topological derivatives.
We can show that the defects are determined with sufficient accuracy using the topological derivatives calculated with the normal component of the particle velocity on the surface.