An assessment of the state of the art in predicting the failure of ceramics: Final report

Technical Report · Tue Mar 01 00:00:00 EST 1988

DOI:https://doi.org/10.2172/5185845· OSTI ID:5185845

Boulet, J A.M.

The greatest weakness in existing design strategies for brittle fracture is in the narrow range of conditions for which the strategies are adequate. The primary reason for this weakness is the use of simplistic mechanical models of fracture processes and unverified statistical models of materials. To improve the design methodology, the models must first be improved. Specifically recommended research goals are: to develop models of cracks with realistic geometry under arbitrary stress states; to identify and model the most important relationships between fracture processes and microstructural features; to assess the technology available for acquiring statistical data on microstructure and flaw populations, and to establish the amount of data required for verification of statistical models; and to establish a computer-based fracture simulation that can incorporate a wide variety of mechanical and statistical models and crack geometries, as well as arbitrary stress states. 204 refs., 2 tabs.

• Research Organization: Tennessee Univ., Knoxville (USA). Dept. of Engineering Science and Mechanics
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5185845
• Report Number(s): ORNL/Sub-86-57598/1; ON: DE88008998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
CRACK PROPAGATION
FAILURES
FRACTURE MECHANICS
FRACTURES
SERVICE LIFE
BIBLIOGRAPHIES
DEFECTS
EVALUATION
FATIGUE
INFORMATION NEEDS
LIFETIME
MATHEMATICAL MODELS
PROGRESS REPORT
RECOMMENDATIONS
REVIEWS
SURVEYS
DOCUMENT TYPES
MECHANICAL PROPERTIES
MECHANICS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties