Nondestructive Evaluation of a Bifurcated Crack by Means of the Measurement of Magnetic Field Induced by D. C. Current Flow

Masumi Saka, Hiroyuki Yuuki, Hiroyuki Abe

Research output: Contribution to journalArticlepeer-review

Abstract

Nondestructive evaluation of bifurcated cracks is a key issue in maintenance of tracks for highspeed trains. Magnetic flux density for a rectangular parallelepiped material in which direct current flows is analyzed. The material contains an embedded and through-wall horizontal crack and a bifurcated crack from the horizontal one. The magnetic flux density in the air near the top surface of the rectangular specimen is obtained by using a 3-D finite-element method. The maximum change due to the cracks in the component of magnetic flux density in the direction of the width of the rectangular parallelepiped is shown to be related to the length and the depth of the horizontal crack and the bifurcated crack. A technique of quantitative nondestructive evaluation of the vertical component of the bifurcated crack is proposed and is verified by experiment.

Original languageEnglish
Pages (from-to)2335-2341
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume61
Issue number591
DOIs
Publication statusPublished - 1995

Keywords

  • Bifurcated Crack
  • Direct Current
  • Finite-Element Method
  • Magnetic Field
  • Nondestructive Inspection
  • Numerical Analysis

ASJC Scopus subject areas

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

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