An experimental study of damage detection on typical joints of jackets platform based on electro-mechanical impedance technique

Liaqat Ali, Sikandar Khan*, Naveed Iqbal*, Salem Bashmal, Hamad Hameed, Yong Bai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Many methods have been used in the past two decades to detect crack damage in steel joints of the offshore structures, but the electromechanical impedance (EMI) method is a comparatively recent non-destructive method that can be used for quality monitoring of the weld in structural steel joints. The EMI method ensures the direct assessment, analysis and particularly the recognition of structural dynamics by acquiring its EM admittance signatures. This research paper first briefly introduces the theoretical background of the EMI method, followed by carrying out the experimental work in which damage in the form of a crack is simulated by using an impedance analyser at different distances. The EMI technique is used to identify the existence of damage in the welded steel joints of offshore steel jacket structures, and Q345B steel was chosen as the material for test in the present study. Sub-millimetre cracks were found in four typical welded steel joints on the jacket platform under circulating loads, and root average variance was used to assess the extent of the crack damage.

Original languageEnglish
Article number7168
JournalMaterials
Volume14
Issue number23
DOIs
StatePublished - 1 Dec 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Damage detection
  • Electromechanical impedance
  • Non-destructive test
  • Piezoelectric transducers
  • Q345B steel materials
  • Welded steel joints

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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