Integral Equation Method for Evaluation of Eddy-Current Impedance of a Rectangular,Near Surface Crack Inside a Cylindrical Hole |
| |
Authors: | Lars Larsson Anders Boström |
| |
Affiliation: | 1.Department of Materials and Manufacturing Technology,Chalmers University of Technology,G?teborg,Sweden;2.Department of Applied Mechanics,Chalmers University of Technology,G?teborg,Sweden |
| |
Abstract: | An integral equation method for solving the eddy-current nondestructive evaluation problem of a flat, rectangular, near surface crack inside of a cylindrical hole in a conducting material is presented. The method involves expanding the Green’s tensor, the incoming field, and the jump in electric potential over the crack in suitable basis functions. Here, plane waves, cylindrical waves, and basis functions related to the Chebyshev polynomials, are used. The way of discretization in this method leads to a formulation where the scattering is defined by a scattering matrix, independent of the incoming field. This presents an advantage, when conducting numerical simulations, since the scattering matrix does not have to be recalculated for every probe position. The numerical calculations are straightforward to perform and model predictions are compared with finite element results. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|