電流入出力端子と電位差計測端子を近接させた直流電位差法による分岐き裂の非破壊評価

• 坂 真澄

• 油 浩一郎

• 阿部 博之

書誌事項

タイトル別名

• Nondestructive Evaluation of a Bifurcated Crack by Means of D.C. Potential Drop Technique Using Adjacent Probes.
• デンリュウ ニュウシュツリョク タンシ ト デンイサ ケイソク タンシ オ キ

抄録

The d.c. potential drop technique based on the use of adjacent probes is applied to the nondestructive evaluation of a crack bifurcated from a nonplanar crack in a rail. The method of evaluation is based on the measurement of the potential drop on the top surface of the rail. The problem of current flow in a material which contains nonplanar and bifurcated cracks is analyzed numerically using a 3-D finite element method. The relationship between the potential drop on the measured surface and the depth of a bifurcated crack is obtained and it is verified in experiments using rail specimens that the cracks can be characterized quantitatively using the 3-D numerical analysis. It is also shown that the sensitivity of the present method using adjacent probes is higher than that of the conventional method in which the uniform current flow in a region far from the crack is used.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 63 (606), 352-357, 1997

  一般社団法人 日本機械学会

キーワード

• Nondestructive Inspection
• Finite Element Method
• Numerical Analysis
• Bifurcated Crack
• Potential Drop Technique
• Rail

詳細情報

• CRID: 1390001204447201280
• NII論文ID: 110002374028
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.63.352
• ISSN: 18848338
• ISSN: 03875008
• NDL書誌ID: 4148464
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4148464
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/63/606/63_606_352/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可