Fractal characterization of brittle fracture in ceramics under mode I stress loading

Fractal characterization of brittle fracture in ceramics under mode I stress loading

The self-affine behavior of Brazilian disk test titanium oxide specimens for KIc measurement was investigated from 3D elevation maps obtained at regular intervals following crack extension. The bifractal approach could be adopted due to the self-affine characteristics of crack propagation under line...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2010-07, Vol.527 (18-19), p.4847-4850
Hauptverfasser: Horovistiz, Ana Lúcia, de Campos, Kamila Amato, Shibata, Silvia, Prado, Camila C.S., Hein, Luis Rogerio de Oliveira
Format: Artikel
Sprache:eng
Schlagworte:
Ceramics
Condensed matter: structure, mechanical and thermal properties
Crack propagation
Disks
Elevation
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Fractal analysis
Fractals
Fracture
Fracture mechanics
Intervals
Light microscopy
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
Structural materials
Three dimensional
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Zusammenfassung:The self-affine behavior of Brazilian disk test titanium oxide specimens for KIc measurement was investigated from 3D elevation maps obtained at regular intervals following crack extension. The bifractal approach could be adopted due to the self-affine characteristics of crack propagation under linear elastic regime, determining fractal dimensions associated to micro- (DT) and macro- (DS) resolution scales. It was found that fractal dimension data were dependent on crack front positions, and could not be related to fracture toughness.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2010.04.014