Probabilistic evaluation of the area of coverage of a probe used for eddy current non-destructive inspections

Noritaka Yusa, Takuma Tomizawa, Haicheng Song

Research output: Contribution to journalArticlepeer-review

Abstract

This study proposes a method to probabilistically evaluate the area of coverage of nondestructive inspections to detect defects on a surface of a structure. For the specific problem, this study considers the effect of the distance between two neighboring scanning lines on the detectability of eddy current testing against near-side cracks. Thirty-eight type 316L stainless steel plates having a fatigue crack were prepared, and eddy current examinations were performed with a sufficiently fine scanning pitch. The full width at half maximum of the spatial distribution of the amplitude of the signals was approximated using a Gaussian function. A probability of detection model considering the distance between two neighboring scanning lines is proposed because in actual inspections a scanning line does not always run directly above a crack. The results demonstrated that the proposed model enables a reasonable probabilistic evaluation of the effect of the distance between two neighboring scanning lines.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume64
Issue number1-4
DOIs
Publication statusPublished - 2020

Keywords

  • austenitic stainless steel
  • coverage path
  • Electromagnetic nondestructive evaluation
  • fatigue crack
  • Monte Carlo simulation
  • probability of detection
  • surface breaking crack
  • uncertainty

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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