Analysis of vibration for regions above rectangular delamination defects in solids

Taekeun Oh, John S. Popovics, Sung Han Sim

Research output: Contribution to journalArticlepeer-review


We propose a semi-analytical approach to predict the natural flexural vibration frequencies of the material overlying a near-surface delamination defect in a solid. The formulation accommodates arbitrary length to depth ratio of the defect and higher-order modes of vibration. The material above the defect is modeled as a semi-clamped rectangular plate, where the dynamic edge effect factors, as deduced by Bolotin's asymptotic method, are estimated. The formulation results are evaluated through comparison to 3-D finite element (FE) simulation and experimental results obtained from impact resonance tests on concrete samples with controlled delamination defects. Good agreement with both experimental and 3-D FE results confirms the accuracy of the formulation in all cases.

Original languageEnglish (US)
Pages (from-to)1766-1776
Number of pages11
JournalJournal of Sound and Vibration
Issue number7
StatePublished - Apr 1 2013

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering


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