Nondestructive evaluation of a bifurcated crack by means of d. c. potential drop technique using adjacent probes

Masumi Saka, Koichiro Abura, Hiroyuki Abe

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)352-357
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume63
Issue number606
DOIs
Publication statusPublished - 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Nondestructive evaluation of a bifurcated crack by means of d. c. potential drop technique using adjacent probes'. Together they form a unique fingerprint.

Cite this