FRACTURE MECHANICS: A BASIS FOR BRITTLE FRACTURE PREVENTION,
Abstract
The development of fracture mechanics is presented both historically and mathematically. The central problems and limitations of experimental fracture mechanics are detailed along with the assumptions and approximations used. The meaning, measurement, and utility of plane strain fracture toughness (critical strain energy release rate or critical stress intensity factor) are discussed. The role of defects in components is discussed specifically with respect to the relationships between stress fields, defect geometry, and material condition. Basic aspects of ultrasonic testing are discussed with respect to quantitative measurement of defect geometries in structures. Selected experiments dealing with application of fracture mechanics to predict actual component failures are reviewed. It is shown that the relationships between stress state, defect geometry, elastic constants, and fracture toughness employed in applied fracture mechanics can be utilized to predict brittle failure conditions in a more quantitative manner than transition temperature concepts. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1965
- Accession Number
- AD0629436
Entities
People
- R. E. Johnson