DC AND AC POTENTIAL DROP METHODS - A NUMERICAL MODELING APPROACH
Nath S AMTAK, INC., 2501 N. Loop Drive, Ames, Iowa 50010, USA
Keywords: Potential drop technique, Modeling, Crack, structure, fracture mechanical
ABSTRACT
Fracture analysis is usually performed only after gathering accurate information on the shape and size of the crack. Accurate determination of the crack dimensions therefore is of extreme importance in many structural components. The AC and DC Potential drop methods (ACPD and DCPD) are used to monitor fatigue crack growth and predict the crack length in the fracture mechanics community. The two popular, but complementary numerical methods used widely for simulating NDE phenomena are the finite element method (FEM) and the boundary element method (BEM). This paper discusses some of the key features in the two numerical techniques by modeling the DCPD and ACPD methods.
Publication Source: Trends in NDE Science & Technology; Proceedings of the 14th World Conference on Non-Destructive Testing, New Delhi, 8-13 December 1996.Vol. 1, pages 265 - 268 Publisher:Ashgate Publishing Company
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