Fracture of Al/sub 2/O/sub 3/ in combined tension/torsion - 2. Weibull theory

Journal Article · Sun Nov 01 04:00:00 EST 1981 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1981.tb15866.x· OSTI ID:6855911

Petrovic, J J; Stout, M G

The Weibull statistical fracture theory for multiaxial stresses has been extended to conditions of combined tension/torsion loading. At fracture, a tensile principal stress ratio greater than one is predicted which is dependent on the stress state, Weibull modulus, and fracture location. Comparison to experimental tension/torsion data for Al/sub 2/O/sub 3/ shows that the Weibull theory, although predicting correct trends, generally underestimates strengthening effects of the compressive principal stress, thus providing a conservative failure prediction. This discrepancy may be related to influences of stress state on crack-tip ''process zone'' behavior. 30 refs.

• Research Organization: Los Alamos Natl Lab, NM, USA
• OSTI ID: 6855911
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 64:11; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
FRACTURE PROPERTIES
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
TENSILE PROPERTIES
TORSION