Abstract
In this paper, we try to use the finite element method of 2-D axisymmetry to solve problems in eddy current testing problems where the main idea is detecting crack's shape using the NDT-EC. Results are given for a simple eddy current problem using the finite element method as a tool to control cracks and defects in materials and eventually, to study their propagation as well as their shape classification. These latest can be described as the task of reconstructing the cracks and damage in a tube’s profile of an inspected specimen in order to estimate its material properties. This is accomplished by inverting eddy current probe impedance measurements which are recorded as a function of probe position. This approach has been used in the aircraft industry to control cracks. Besides, it makes it possible to highlight the defects of parts while preserving the integrity of the controlled products.
Highlights
T here are often sharp breaks that cause bad consequences because of existing defects (cracks, micro-cracks, crazes etc...) inside or outside parts [1]
T here are often sharp breaks that cause bad consequences because of existing defects inside or outside parts [1]
Results of a simulation obtained for the case of a non-magnetic tube without defects are illustrated in the following figures: Fig. 2 represents the distribution of the potential of the vector
Summary
T here are often sharp breaks that cause bad consequences because of existing defects (cracks, micro-cracks, crazes etc...) inside or outside parts [1]. A numerical model for the assessment of eddy currents in materials, for the detection and characterization of defects is considered. We first describe the physical and geometrical properties of used materials and we present, through an example, results of eddy currents obtained using a numerical model that we have developed.
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