Structural damage identification in plates via nonlinear structural intensity maps

Fabio Semperlotti, Stephen C. Conlon

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

A nonlinear structural intensity concept is presented as an approach for the identification of defects displaying nonlinear vibration behavior. The nonlinear structural dynamic response exhibited by a riveted joint with loosened fasteners connecting a stiffener with a flat panel is investigated. The excitation, generating elastic waves with dominant bending components, triggers the nonlinear contact between the plate and the stiffener inducing a dynamic response rich with nonlinear harmonics. Experimental structural intensity maps are evaluated at the super-harmonic frequencies. This technique provides an experimental approach for the characterization and two dimensional visualization of nonlinear types of defects.

Original languageEnglish (US)
Pages (from-to)EL48-EL53
JournalJournal of the Acoustical Society of America
Volume127
Issue number2
DOIs
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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