1512. Detecting multiple small-sized damage in beam-type structures by teager energy of modal curvature shape

W. Xu, M. S. Cao, M. Radzieński, N. Xia, Z. Su, W. Ostachowicz, S. S. Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


Detection of multiple damage using modal curvature has become a research focus of great significance in recent years. Nevertheless, a noticeable deficiency of modal curvature is its inadequacy in identifying small-sized damage, which usually results in damage signatures being obscured by the global fluctuation trend of modal curvature. To address this deficiency, this study develops a damage feature of Teager energy of modal curvature shape to identify multiple small-sized damage against the global fluctuation trend of the modal curvature. The advantage of this damage feature over the traditional modal curvature in small-sized damage characterization is first verified in analytical cases of cracked beams with various types of boundary condition, and further validated in a cracked carbon-fiber-reinforced polymer composite beam with the mode shapes acquired using a scanning laser vibrometer.

Original languageEnglish
Pages (from-to)275-286
Number of pages12
JournalJournal of Vibroengineering
Issue number1
Publication statusPublished - Feb 2015


  • Composite beam
  • Crack
  • Damage detection
  • Fracture mechanics
  • Modal curvature shape
  • Mode shape
  • Multiple small-sized damage
  • Scanning laser vibrometer
  • Teager energy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering

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