Mixed-mode fracture toughness of ceramic materials
- Brown Univ., Providence, RI (USA). Div. of Engineering
- Florida Univ., Gainesville, FL (USA). Dept. of Materials Science and Engineering
An experimental technique whereby pure mode I, mode II, and combined mode I-mode II fracture toughness values of ceramic materials can be determined using four-point bend specimens containing sharp, through-thickness precracks is discussed. In this method, notched and fatigue-precracked specimens of brittle solids are subjected to combined mode I-mode II and pure mode II fracture under asymmetric four point bend loading and to pure mode I under symmetric bend loading. A detailed finite element analysis of the test specimen is performed to obtain stress intensity factor calibrations for a wide range of loading states. The effectiveness of this method to provide reproducible combined mode I- mode II fracture toughness values is demonstrated with experimental results obtained for a polycrystalline Al{sub 2}O{sub 3}.
- OSTI ID:
- 6021786
- Journal Information:
- Journal of the American Ceramic Society; (USA), Vol. 73:5; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CERAMICS
FRACTURE MECHANICS
ALUMINIUM OXIDES
CRACK PROPAGATION
FATIGUE
FINITE ELEMENT METHOD
FRACTURE PROPERTIES
TORSION
ALUMINIUM COMPOUNDS
CHALCOGENIDES
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL SOLUTION
OXIDES
OXYGEN COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties