JSME International Journal Series A Solid Mechanics and Material Engineering
Online ISSN : 1347-5363
Print ISSN : 1344-7912
ISSN-L : 1344-7912
Analysis of Direct Current Potential Field around Multiple Spherical Defects
Naoya TadaEisuke NakayamaTakayuki KitamuraRyuichi Ohtani
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2000 Volume 43 Issue 2 Pages 109-116


A method for evaluating the distribution of electrical potential around multiple spherical defects was proposed. As the method is based on the known formulated solution for a single defect, the electric field could be analyzed efficiently in comparison with the other methods, such as finite element method. The electric field in a conductive material with multiple spherical defects at random locations was analyzed by the method. Result of the analysis showed that the increase in the potential difference normalized by the potential difference without defects, ΔV/V0, was in proportion to the product of the volumetric density of defects and the mean of cubed defect radius, nv[r3]m. This universal relationship held independently of the value of nv and the distribution of defect radius. Using the relationship, the damage due to the multiple defects can be evaluated from the increase in potential difference.

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