Numerical and experimental verification of a technique for locating a fatigue crack on beams vibrating under Gaussian excitation

Salvatore Benfratello, Attilio Masnata, Impollonia, Cacciola, Muscolino

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32 Citazioni (Scopus)

Abstract

The stationary vibrations of a beam excited by Gaussian noise are strongly affected by the presence of a fatigue crack. Indeed, as soon as the crack arises the system response becomes non-linear due to crack breathing and a non-Gaussian behaviour is encountered. The paper presents both numerical and experimental investigations in order to assess the capability of the non-Gaussianity measures to detect crack presence and position. Monte Carlo method is applied to evaluate in time domain the higher order statistics of a cantilever beam modelled by finite elements. The skewness coefficient of the rotational degrees of freedom appears the most suitable quantity for identification purpose being very sensitive to the non-linear behaviour of the cracked beam.
Lingua originaleUndefined/Unknown
pagine (da-a)20-30
RivistaEngineering Fracture Mechanics
Volume6
Stato di pubblicazionePublished - 2006

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cita questo

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title = "Numerical and experimental verification of a technique for locating a fatigue crack on beams vibrating under Gaussian excitation",
abstract = "The stationary vibrations of a beam excited by Gaussian noise are strongly affected by the presence of a fatigue crack. Indeed, as soon as the crack arises the system response becomes non-linear due to crack breathing and a non-Gaussian behaviour is encountered. The paper presents both numerical and experimental investigations in order to assess the capability of the non-Gaussianity measures to detect crack presence and position. Monte Carlo method is applied to evaluate in time domain the higher order statistics of a cantilever beam modelled by finite elements. The skewness coefficient of the rotational degrees of freedom appears the most suitable quantity for identification purpose being very sensitive to the non-linear behaviour of the cracked beam.",
author = "Salvatore Benfratello and Attilio Masnata and Impollonia and Cacciola and Muscolino",
year = "2006",
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journal = "Engineering Fracture Mechanics",
issn = "0013-7944",
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TY - JOUR

T1 - Numerical and experimental verification of a technique for locating a fatigue crack on beams vibrating under Gaussian excitation

AU - Benfratello, Salvatore

AU - Masnata, Attilio

AU - Impollonia, null

AU - Cacciola, null

AU - Muscolino, null

PY - 2006

Y1 - 2006

N2 - The stationary vibrations of a beam excited by Gaussian noise are strongly affected by the presence of a fatigue crack. Indeed, as soon as the crack arises the system response becomes non-linear due to crack breathing and a non-Gaussian behaviour is encountered. The paper presents both numerical and experimental investigations in order to assess the capability of the non-Gaussianity measures to detect crack presence and position. Monte Carlo method is applied to evaluate in time domain the higher order statistics of a cantilever beam modelled by finite elements. The skewness coefficient of the rotational degrees of freedom appears the most suitable quantity for identification purpose being very sensitive to the non-linear behaviour of the cracked beam.

AB - The stationary vibrations of a beam excited by Gaussian noise are strongly affected by the presence of a fatigue crack. Indeed, as soon as the crack arises the system response becomes non-linear due to crack breathing and a non-Gaussian behaviour is encountered. The paper presents both numerical and experimental investigations in order to assess the capability of the non-Gaussianity measures to detect crack presence and position. Monte Carlo method is applied to evaluate in time domain the higher order statistics of a cantilever beam modelled by finite elements. The skewness coefficient of the rotational degrees of freedom appears the most suitable quantity for identification purpose being very sensitive to the non-linear behaviour of the cracked beam.

UR - http://hdl.handle.net/10447/20032

M3 - Article

VL - 6

SP - 20

EP - 30

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

ER -