structural damage detection using energy flow models

Clicks: 165
ID: 198247
2008
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Abstract
The presence of a crack in a structure modifies the energy dissipation pattern. As a consequence, damaged structures can present high localized damping. Experimental tests have revealed that crack nucleation and growth increase structural damping which makes this phenomenon useful as a damage locator. This paper examines the energy flow patterns caused by localized damping in rods, beams and plates using the Energy Finite Element Method (EFEM), the Spectral Element Method (SEM) and the Energy Spectral Element Method (ESEM) in order to detect and locate damage. The analyses are performed at high frequencies, where any localized structural change has a strong influence in the structural response. Simulated results for damage detection in rods, beams, and their couplings calculated by each method and using the element loss factor variation to model the damage, are presented and compared. Results for a simple thin plate calculated with EFEM are also discussed.
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santos2008shockstructural Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;E.R.O. Santos;V.S. Pereira;J.R.F. Arruda;J.M.C. Dos Santos
Journal Nano letters
Year 2008
DOI
10.1155/2008/176954
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