An advanced nonlinear signal analysis method for damage detection in geomaterials

--An algorithm is described which enables us to evaluate the Volterra kernels and the corresponding transfer functions. This method is then used to detect the cracking threshold of the geomaterials under loading. The responses of a sample of sandstone under axial leading and subjected to ultrasonic...

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Veröffentlicht in:	Pure and Applied Geophysics 1997-12, Vol.150 (3-4), p.647-659
Hauptverfasser:	BAZARGAN-SABET, B, LIU, H, CHANCHOLE, S
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Crack initiation Cracking (fracturing) Cracks Damage detection Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Engineering geology Exact sciences and technology Fracture mechanics Geomaterials Geophysics Kernels Load Nonlinearity Sandstone
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Beschreibung
Zusammenfassung:	--An algorithm is described which enables us to evaluate the Volterra kernels and the corresponding transfer functions. This method is then used to detect the cracking threshold of the geomaterials under loading. The responses of a sample of sandstone under axial leading and subjected to ultrasonic excitation are analyzed. The occurrence of microcracking is characterized by the changes in the linear and nonlinear parts of the measured signal energy.
ISSN:	0033-4553 1420-9136
DOI:	10.1007/s000240050097