DC potential-drop technique for the evaluation of 3-D back-wall cracks in steel structures

S. Reaz Ahmed, Masumi Saka, Fumio Takeo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A direct-current potential-drop NDE technique has been developed for the evaluation of a 3-D back-wall crack in thick-walled structures. The measuring system contains two pairs of probes - one for current supply and the other for the measurement of potential-drop, where the current-supply and measuring probes are in close proximity to each other. The optimum arrangement of the four-point-probes system is determined from the finite-element simulation of the three-dimensional electric crack problem. The predicted potential-drop across the crack has been verified experimentally using the newly developed measuring sensor. Measured results of semi-elliptical cracks in stainless steel plates establish the practicality as well as reliability of the present potential-drop method of testing for the evaluation of 3-D back-wall cracks in thick-walled structures.

Original languageEnglish
Pages (from-to)434-440
Number of pages7
JournalKey Engineering Materials
Volume321-323 I
Publication statusPublished - 2006 Jan 1

Keywords

  • Back-wall 3-D crack
  • Direct current
  • Potential drop
  • Thick-walled structure

ASJC Scopus subject areas

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

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