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

Attilio Masnata, Salvatore Benfratello, Impollonia, Cacciola, Muscolino

Risultato della ricerca: Articlepeer review

33 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