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

Author(s)

Horovistiz, Ana Lucia ^[1] ; de Campos, Kamila Amato ^[2] ; Shibata, Silvia ^[2] ; Prado, Camila C. S. ^[2] ; de Oliveira Hein, Luis Rogerio ^[2]

Affiliation

^[1] IPEN CNEN SP, BR-05508000 Sao Paulo - Brazil

^[2] UNESP, Fac Engn Guaratingueta, Dept Mat & Tecnol, BR-12516410 Guaratingueta, SP - Brazil

• Document type: Journal article
• Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 527, n. 18-19, p. 4847-4850, JUL 15 2010.
• Web of Science Citations: 8

Abstract

The self-affine behavior of Brazilian disk test titanium oxide specimens for K(Ic) 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- (D(T)) and macro- (D(S)) resolution scales. It was found that fractal dimension data were dependent on crack front positions, and could not be related to fracture toughness. (C) 2010 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 09/08760-9 - Quantitative fractography of composites: texture, topography and fracture toughness correlation
• Grantee: Luis Rogerio de Oliveira Hein
• Support Opportunities: Regular Research Grants
• FAPESP's process: 08/01788-2 - Quantitative fractography: fractal behavior analysis for delimitation of fracture micromechanisms in composites through digital image processing
• Grantee: Kamila Amato de Campos
• Support Opportunities: Scholarships in Brazil - Master