Identification of a scatterer embedded in elastic heterogeneous media using dynamic XFEM
Dynamic (as opposed to static) data are used, which is more appropriate for nondestructive testing and evaluation. A gradient-based formulation is developed, which requires far fewer iterations than genetic algorithms (previous work). Effects of the number of sensors on the objective function are investigated. Heterogeneous hosts are considered. Several different scatterers are considered (line cracks, circular holes, and circular inclusions).
dynamic xfem inverse-scattering gradient-based minimization inverse problems non-destructive testing