On the Use of the Polynomial Annihilation Edge Detection for Locating Cracks in Beam-Like Structures

Book · Tue Jan 01 00:00:00 EST 2013

OSTI ID:1111460

Saxena, Rishu ^[1]; Surace, Cecilia ^[2]; Archibald, Richard K ^[1]

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1. ORNL
2. Politecnico di Torino

A crack in a structure causes a discontinuity in the first derivative of the mode shapes: On this basis, a numerical method for detecting discontinuities in smooth piecewise functions and their derivatives, based on a polynomial annihilation technique, has been applied to the problem of crack detection and localisation in beam-like structures for which only post-damage mode shapes are available. Using a finite-element model of a cracked beam, the performance of this methodology has been analysed for different crack depths and increasing amounts of noise. Given the crack position, a procedure to estimate its depth is also proposed and corresponding results shown.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1111460
• Country of Publication: United States
• Language: English