Award Data

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AN EFFICIENT COMPUTATIONAL METHOD IS PROPOSED FOR MODELING THE COMPLEX PHYSICAL PHENOMENA OCCURING IN HIGH ENERGY CONTINUOUS WAVE LASER FLOW FIELDS. THESE FLOWS TYPICALLY CONTAIN BOUNDARY LAYERS, MIXING LAYERS, WAKES, AND EMBEDDED SHOCK WAVES. IT IS DIFFICULT TO GENERATE A MESH APRIOR WHICH WILL RESOLVE ALL FEATURES OF THE FLOW. THEREFORE, AN ADAPTIVE GRID TECHNIQUE WILL BE USED AND COUPLED TO AN ...

REQUIREMENTS FOR MATERIAL CHARACTERIZATION ARE BECOMING MORE STRINGENT AS THE ROLE OF THE TRACE ELEMENT COMPOSITION OF HIGHTECHNOLOGY DEVICES BECOMES APPARENT. IN SEMICONDUCTOR RESEARCH, FOR INSTANCE, THERE IS A NEED FOR ULTRA-TRACE ELEMENT ANALYSIS IN SOLIDS BELOW THE PPBA LEVEL WITH SPATICAL RESOLUTION IN THE FEW MICRON RANGE. RESONANCE IONIZATION SPECTROSCOPY (RIS) INVOLVES THE STEPWISE EXCITAT ...

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FATIGUE LIFE ENHANCEMENT OF BUSHED TITANIUM LUGS WILL BE INVESTIGATED. A UNIQUE TECHNBIQUE, FORCEMATE (FM), FOR INSTALLATION OF BUSHINGS WILL BE DEMONSTRATED. EFFECT OF PROCESS PARAMETERS WILL BE EVALUATED AND THOSE PARAMETERS OPTIMIZED FOR THE PARTICULAR CONFIGURATION UNDER INVESTIGATION. AT EACH PHASE OF THE INVESTIGATION, FATIGUE LIFE COMPARISONS WILL BE MADE BETWEEN LUGS AND BUSHINGS INSTALLED ...

THE PROPOSED WORK WILL EVALUATE THE FEASIBILITY OF HAFNIUM CARBIDE FIBERPRODUCTION THROUGH PYROLYSIS OF ORGANOHAFNIUM POLYMER PRECURSORS. IN THIS CHEMICAL APPROACH TO CERAMIC PROCESSING, THE METHODS TO SYNTHESIZE ORGANOMETALLIC CHEMICALS SUITABLE FOR THE FORMATION OF ORGANOHAFNIUM POLYMERS AND TO FORM POLYMERIC FIBERS WITH AN (-HF-CHF-) BACKBONE WILL BE EXPLORED. THE POLYMERS WILL THEN BY PYROLYZE ...

COMPOSITE STRUCTURES IN SPACE MAY BE SUBJECT TO SOURCE OF THERMAL ENERGY, WHICH INCLUDES X-RAYS FROM NUCLEAR WEAPONS AND HIGH ENERGY LASER LIGHT. THIS PROPOSAL ADDRESSES THE NEED FOR ANALYSIS TOOLS TO PREDICT THE EFFECTS OF RAPID THERMAL PULSE LOADING ON AEROSPACE COMPOSITE MATERIALS. A MAJOR OBJECTIVE OF THIS PHASE I STUDY IS TO DETERMINE THE FEASIBILITY AND MAGNITUDE OF EFFORT TO DEIVER SUCH AN ...

THE DEVELOPMENT OF AN AUTOMATED CUP INSPECTION MODULE IS PROPOSED. THE OBJECTIVES OF THE PHASE I EFFORT ARE TO ESTABLISHED THE PARAMETERS WHICH MUST BE MEASURED AND THEIR REQUIRED RESOLUTION. THE PARAMETERS INCLUDE HARDNESS, OUTSIDE AND INSIDE DIAMETERS, BASE THICKNESS, TOTAL LENGTH, AND WALL THICKNESS. IN PHASE I, THE MEASUREMENT CONCEPTS WILL BE MOCKED-UP AND DYNAMICALLY TESTED TO VERIFY THEIR G ...