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http://dx.doi.org/10.3795/KSME-A.2011.35.6.583

Dielectric Breakdown Analysis of Bone-Like Materials with Conductive Channels  

Lee, Bo-Hyun (Dept. of Mechanical Engineering, Inha Univ.)
Lin, Song (Dept. of Mechanical Engineering, Inha Univ.)
Beom, Hyeon-Gyu (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.35, no.6, 2011 , pp. 583-589 More about this Journal
Abstract
The dielectric breakdown of bone-like materials subject to purely electric fields is investigated. In general, these materials consist of some layers with stronger dielectric strength and others with weaker dielectric strength in a parallel staggered pattern. The growth of the conductive channel is impeded during penetration of the weaker layer in the bone-like material because the electric-field concentration is relieved. The electric-field distribution around the head of the tubular channel is obtained from finite element analysis. The dielectric strength of the bone-like material is evaluated using the J integral, and some parameters affecting the dielectric strength are determined. It is shown that the J-integral values are reduced with an increase in the breakdown area in the weaker layer. It is also found that the ratio of the permittivity of the weaker layer to that of the stronger layer can strongly affect the dielectric breakdown.
Keywords
Dielectric Breakdown; Hierarchical Structure; Conductive Channel; J Integral; Finite Element Analysis;
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