Magnetic stray field measurements to identify and localise impact-induced plastic deformation in a steel structure

P. C. Meijers*, C. T. Jolink, A. Tsouvalas, A. V. Metrikine

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

To study the irreversible changes in the magnetic stray field surrounding a steel structure caused by impact-induced elastic and plastic deformations, a steel cylinder was repeatedly subjected to axial impacts of various magnitudes. Due to impacts that induce elastic deformation, the measured magnetic stray field of the structure converges to a global magnetic equilibrium. However, as soon as plastic deformation develops, a deviation from this trend is observed. From the spatial distribution of the stray field, the location of the plastic deformation is determined. Subsequently, the underlying processes of the measured evolution of the stray field are discussed and successfully incorporated into an elementary model of the structure's magnetisation to simulate the results from the experiment. It is expected that the reported observation is useful for a class of engineering applications in which non-contact and non-collocated measurements can be utilised to identify structural damage under dynamic loading.

Original languageEnglish
Article number106990
Number of pages8
JournalInternational Journal of Mechanical Sciences
Volume217
DOIs
Publication statusPublished - 2022

Keywords

  • Axial impact
  • Magnetic stray field changes
  • Plastic deformation
  • Steel cylindrical structure

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