Use of nonlinear vibration frequencies and electrical conductivity measurements in the separation of internal and boundary damage in structures

Eric A. Butcher, Igor Sevostianov, Ma'en S. Sari, Mohammad A. Al-Shudeifat

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

The paper addresses one of the key problems in structural health monitoring -how to separate defects, both microscopic and macroscopic, accumulated in structural members from damage in the joints and boundaries. It is suggested to use a simultaneous set of measurements - nonlinear vibration frequencies and electrical conductivities - to distinguish between three distinct types of defects. Nonlinearities occur as a result of breathing internal cracks and slapping in damaged joints. The use of proper orthogonal decomposition and a local equivalent linear stiffness method allows for model updating to account for the damage. The theory is presented for full three-dimensional elastic solids and illustrated via the problem of a beam damaged both internally as well as at the boundaries.

Original languageBritish English
Title of host publication2008 Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Pages589-598
Number of pages10
DOIs
StatePublished - 2009
Event2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 - Boston, MA, United States
Duration: 31 Oct 20086 Nov 2008

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume11

Conference

Conference2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Country/TerritoryUnited States
CityBoston, MA
Period31/10/086/11/08

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