Mixed-mode fracture toughness of ceramic materials

Journal Article · Tue May 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb05189.x· OSTI ID:6021786

Suresh, S; Shih, C F; O'Dowd, N P ^[1]; Morrone, A ^[2]

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1. Brown Univ., Providence, RI (USA). Div. of Engineering
2. 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), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:5; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
CRACK PROPAGATION
FATIGUE
FINITE ELEMENT METHOD
FRACTURE MECHANICS
FRACTURE PROPERTIES
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL SOLUTION
OXIDES
OXYGEN COMPOUNDS
TORSION