Crack detection and location in a damaged beam vibrating under white noise

Pierfrancesco Cacciola, N. Impollonia, G. Muscolino

Research output: Contribution to journalArticle

Abstract

The aim of this paper is to inspect the vibrational response of a beam with an edge non-propagating crack by means of stochastic analysis, in order to detect the presence and the location of structural damage. Monte Carlo method is applied to evaluate in time domain the higher order statistics of the non-linear beam modelled by finite elements. The numerical application performed on a cantilever beam shows high sensitivity of the skewness coefficient of the rotational degrees of freedom to the non-linear behaviour of the system. By measurement of such coefficient both crack presence and position can be estimated. The proposed procedure allows treating beam with small crack even when other techniques fail to identify the crack presence.
Original languageEnglish
Pages (from-to)1773-1782
Number of pages10
JournalComputers and Structures
Volume81
Issue number18-19
Publication statusPublished - 2003

Keywords

  • Probabilistic fracture mechanics
  • Non-linear systems
  • Monte Carlo simulation
  • Crack detection
  • Skewness coefficient
  • Non-Gaussian PDF

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