Research programs involved alloy preparation, studies of environmental effects, elevated and room temperature fatigue behavior, creep-fatigue interaction studies, fatigue crack growth in stiffened and unstiffened panels, determination of threshold levels for fatigue crack growth, and an assessment of the role of fracture toughness and mean stress in fatigue crack growth. The fatigue behavior of composite materials as well as of a number of structural materials such as Ti-6Al-4V was investigated. Advances in the use of thermal conductivity to study dislocation arrays have been made, and the use of surface waves to detect and monitor fatigue cracks has been developed.
- See also AD-753 687.
University of Connecticut, StorrsDepartment of Metallurgy
Storrs, CT USA 06268
- McEvily, AJJ
- Publication Date: 1973-9
- Pagination: 17 p.
- TRT Terms: Cracking; Creep; Fatigue cracking; Fracture mechanics
- Uncontrolled Terms: Crack propagation
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00052237
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: Final Rpt
- Contract Numbers: F44620-69-C-0011
- Files: TRIS
- Created Date: May 7 1974 12:00AM