3615 補助電流を付加した直流電位差法による背面き裂の同定に関する有限要素法解析(S13-4 疲労特性と設計,S13 実用構造材料の疲労問題と健全性評価)

概要

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In conventional direct-current potential difference method (DC-PDM), uniform current is supplied far from a crack and the change in the potential difference by the crack is measured. The identification of the crack is done based on it. But in the case of a crack on the back surface, the change is not large enough and the identification is usually difficult. In this study, auxiliary current is supplied in addition to the remote uniform current and the improvement of identification of the crack existing on the back surface is investigated using the finite element method. Based on the analysis results, effect of the location of the auxiliary current and its strength on the measured potential difference is discussed.
2006-09-15