Mechanical properties for advanced engine materials. Final report, 27 Aug 87-17 May 91
The experimental evaluation of advanced mechanical properties that characterize the behavior of emerging materials for aerospace structures under a broad range of conditions representative of those encountered in service was emphasized in this investigation. The information guided the development of life prediction methodologies which are based on the concept of damage tolerance as a design philosophy. The research effort was subdivided into four interrelated tasks --(a) material characterization tests, (b) experimental procedure and test developments, (c) analytical and modeling developments, and (d) test support activities and data archival. Material characterization tests for fatigue, creep, and crack growth responses were conducted on a titanium matrix composite reinforced with continuous SiC fibers and fabricated from a foil-fiber-foil layup. The molybdenum wire used in the weaving of the fiber mats was a major factor in the development of damage under fatigue and creep test conditions. A model ceramic matrix composite composed of an aluminosilicate glass matrix and SiC fiber tows provided some interesting fatigue and fracture toughness responses. Behavior of monolithic materials were evaluated under creep, creep crack growth, fatigue crack growth, and oxidation conditions. Significant developments in test procedures and systems have been accomplished with emphasis on conducting thermomechanical fatigue (TMF) tests.
- Research Organization:
- Dayton Univ., OH (United States). Research Inst.
- OSTI ID:
- 7177657
- Report Number(s):
- AD-A-252632/5/XAB; UDR-TR--91-149; CNN: F33615-87-C-5243
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COMPOSITE MATERIALS
COMPUTERS
CRACKS
CREEP
DAMAGE
DETECTION
ELEMENTS
ENGINES
FATIGUE
FIBERS
FLUID MECHANICS
GAS TURBINE ENGINES
GEOMETRY
GLASS
HEAT ENGINES
HYDRAULICS
INTERNAL COMBUSTION ENGINES
LABORATORIES
LASERS
MATERIALS
MATHEMATICS
MECHANICAL PROPERTIES
MECHANICS
METALS
MOLYBDENUM
OXIDATION
PROCESSING
RESONANCE
SILICON CARBIDES
SILICON COMPOUNDS
STRESSES
SURFACES
THERMAL FATIGUE
TITANIUM ALLOYS
TOLERANCE
TRANSITION ELEMENTS