Analysis of Direct Current Potential Difference in a Multiple-Cracked Material.

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  • 多数き裂型損傷を受けた材料の直流電位差に関する解析
  • タスウ キレツガタ ソンショウ オ ウケタ ザイリョウ ノ チョクリュウ デン

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Abstract

The electric field in a conductive material with multiple circular cracks is analyzed by means of the crack-flow modification method (CFMM). It is found that the increase in the potential difference of the cracked meterial normalized by the potential difference without cracks, ΔV/V0, is in proportion to the product of the effective volumetric crack density and the mean of the cubed crack radius, neff[γ3]m. This universal relationship is also valid for multiple semi-circular cracks on the surface of the material and gives the physical meaning of damage detected by the direct current electrical potential method.

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