TITLE

Three-dimensional reconstruction of surface-breaking flaws using finite element methods

AUTHOR(S)
Gladchtein, R. Schifini; Bruno, A. C.
PUB. DATE
May 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 509 Issue 1, p897
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present an iterative algorithm that reconstructs the geometry of three-dimensional surface-breaking flaws from measurements using an NDE magnetic flux leakage technique. Several surface-breaking flaws in a ferromagnetic sample have been modeled using the finite element method and later reconstructed by an optimization routine. This reconstruction was achieved by modifying the coordinates of several surface nodes of the finite element mesh, solving the magnetostatic problem, and optimizing it by a least-squares method. The magnetic field was measured above the surface of the sample. This inverse solution algorithm might be particularly useful to characterize flaws detected by magnetic in-line inspection tools in oil and gas pipelines. © 2000 American Institute of Physics.
ACCESSION #
6029031

 

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