Gjornâl Furlan des SiencisFriulian Journal of Science

No. 30 (2020): GFS
RASSEGNIS

Recent results on the identification of an open crack in a beam from minimal eigenfrequency data

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  • ANTONINO MORASSI
ANTONINO MORASSI
Polytechnic Department of Engineering and Architecture, University of Udine, Via Cotonificio 114, 33100 Udine, Italy.

Peraulis clâf

  • Damage identification,
  • cracks,
  • resonant and antiresonant frequencies,
  • beams with variable profile,
  • inverse problems

Cemût citâ

[1]
MORASSI, A. 2020. Recent results on the identification of an open crack in a beam from minimal eigenfrequency data. Gjornâl Furlan des Siencis - Friulian Journal of Science. 30 (May 2020), 81–100.

Ristret

We review some recent results on the identification of an open crack in a straight elastic beam with smooth variable profile, either under axial or in-plane bending infinitesimal vibration, from the knowledge of a suitable pair of eigenfrequencies. We investigate on sufficient conditions for the unique identification of the crack and we present a constructive algorithm based on the λ-Curves Method. We also discuss a generalization of the methodology to rods with piecewise smooth profile.

PDF (English)

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