DESIGN, FABRICATION, TESTING AND EVALUATION OF DAMAGE TOLERANT BERYLLIUM STRUCTURES.
Abstract
The report describes an analytical and experimental research program performed to develop design concepts and design criteria for increasing the damage tolerance of beryllium structural components. Element tests were conducted to determine tensile and bend properties of the as-received beryllium and the fatigue crack propagation rate and residual static strength of cracked beryllium sheet. Following that, three beryllium damage tolerant panel designs were evaluated and compared through design, fabrication, static and fatigue tests with one beryllium and two aluminum panel designs which incorporated no special features to increase damage tolerance. All of the beryllium designs were superior to the aluminum panels for fatigue loading. Two of the beryllium panel designs were super to the aluminum panel designs for both static and fatigue loading after some initial damage existed. The test results show that the damage tolerance of beryllium panels can be increased by incorporating design features which limit the growth of cracks resulting from damage or local imperfections thus precluding catastrophic failure of the structure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1968
- Accession Number
- AD0841142
Entities
People
- D. L. Rich
- J. M. Finn
- L. C. Koch