Finite element modeling of pulsed eddy current NDT phenomena

Conference · Wed May 15 00:00:00 EDT 1985

OSTI ID:5391749

Allen, B; Ida, N; Lord, W

Transient fields for nondestructive testing (pulsed eddy current methods) have been used experimentally for such applications as coating thickness measurements and the inspection of reactor fuel tubing. The lack of suitable models to facilitate understanding of the interaction of the pulsed field with the test specimen has hindered a wider acceptance of the method as a tool in NDT. Two models, based on the finite element technique are described. The first model, used for repetitive pulse train sources makes use of the Fourier series of the source current to solve a steady state problem for each significant harmonic. The harmonic solutions are then summed to produce the total EMF in the pickup coil. The second model is used for single pulse application. The response is calculated using an iterative time stepping solution. In both cases axisymmetric geometries are studied using a magnetic vector potential formulation. Solutions are compared with experimental results. 3 refs., 3 figs.

• Research Organization: Rockwell International Corp., Golden, CO (USA). Rocky Flats Plant; Akron Univ., OH (USA). Dept. of Electrical Engineering; Colorado State Univ., Fort Collins (USA). Dept. of Electrical Engineering
• DOE Contract Number: AC04-76DP03533
• OSTI ID: 5391749
• Report Number(s): RFP-3835; CONF-850641-5; ON: DE85013221
• Resource Relation: Conference: 5. conference on the computation of electromagnetic fields, Ft. Collins, CO, USA, 3 Jun 1985; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
42 ENGINEERING
36 MATERIALS SCIENCE
ALUMINIUM
ELECTROMOTIVE FORCE
PIPES
EDDY CURRENT TESTING
STAINLESS STEELS
COMPARATIVE EVALUATIONS
FINITE ELEMENT METHOD
MATHEMATICAL MODELS
PULSED MAGNET COILS
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC TESTING
ELEMENTS
EQUIPMENT
IRON ALLOYS
IRON BASE ALLOYS
MAGNET COILS
MATERIALS TESTING
METALS
NONDESTRUCTIVE TESTING
NUMERICAL SOLUTION
STEELS
TESTING
220900* - Nuclear Reactor Technology- Reactor Safety
420500 - Engineering- Materials Testing
360104 - Metals & Alloys- Physical Properties