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THE OBJECTIVES OF THIS PHASE I PROGRAM ARE (1) TRADE-OFF STUDIED OF VARIOUS OPO CRYSTALS AND IDENTIFICATION OF THE OPTIMAL PERFORMANCE OF THE CRYSTAL; (2) IDENTIFICATION OF THE CRYSTAL FIBER ORIENTATIONS SUITABLE FOR HIGH EFFICIENCY OPO DEVICES USING DIODE LASERS (0.7-0.9 MICRONMETERS, 1.2-1.6 MICROMETERS) AS THE PUMPS AND (3) PREDICTION OF THE FIGURE OF MERIT FOR OPO (THRESHOLD POWER, GAIN) AND C ...

BETTER METHODS TO DELIVER AND DISSEMINATE CARGO ARE NECESSARY TO FULLY EXPLOIT THE CAPABILITIES OF FUTURE INTRATHEATER AIRLIFTERS. THE ARMY'S AND AIR FORCE RENEWED EMPHASIS ON MOBILITY WILL REQUIRE GREATER PRODUCTIVITY BY TRANSPORTATION RESOURCES TO ACHIEVE NATIONAL OBJECTIVES. THE NECESSITATES A MORE THOROUGHLY-INTEGRATED TRANSPORTATION NETWORK. ADVANCED TECHNOLGIES, MATERIALS, AND INNOVATIVE ENG ...

THE OBJECTIVE OF THE PROPOSED WORK IS TO ANALYZE THE HYPERVELOCITY MODELS TESTED AT ARNOLD ENGINEERING DEVELOPMENT CENTER TO DETERMINE THE CAUSE OF NOSETIP FRACTURES. WE WILL ACCOMPLISH THIS GOAL BY PERFORMING TWOAND THREE-DIMENSIONAL FINITE ELEMENT ANALYSES OF THE HYPERVELOCITY MODEL USING DYNA2D AND DYNA3D. IF NECESSARY, WE WILL ALSO DO HYDRODYNAMIC ANALYSES OF THE GAS EXPANSION WHICH DRIVES THE ...

THE PROPOSED RESEARCH PROGRAM WILL PROVIDE AN EVALUATION TOOL FOR ASSESSING THE EFFECTS OF MANUFACTURING AND IN-SERVICE MATERIAL ANOMALIES ON SUBSEQUENT SOLID ROCKET MOTOR PERFORMANCE. THE EVALUATION TOOL CONSISTS OF A NONLINEAR FINITE ELEMENT PROGRAM WITH A COMPOSITE DAMAGE AND FAILURE CONSTITUTIVE MODEL. THE EVALUATION TOOL WILL BE VERIFIED BY CORRELATION WITH LABORATORY TESTS OF DESIGNATED COMP ...

THE OVERALL OBJECTIVE OF THE PHASE I WORK SHALL BE TO DESIGN AND FABRICATE TELEPRESENT MASTER/SLAVE (M/S) TOOLS CAPABLE OF PROVIDING FORCE AND TACTILE FEEDBACK TO THE HAND OF A HUMAN OPERATOR. THIS WORK SHALL INCORPORATE THE EXTENSIVE PREVIOUS DEVELOPMENT ACTIVITIES AT BEGEJ CORPORATION IN THE AREAS OF TACTILE SENSORS AND TACTILE DISPLAYS. THE SCOPE OF THE PHASE I WORK INCLUDES: (1) DESIGN AND FAB ...

PRESENT COMPUTER MODELS USED TO PREDICT VAPOR CLOUD LENGTH, CONCENTRATION AND DURATION AT AIR FORCE INSTALLATIONS DO NOT PROPERLY ACCOUNT FOR THE EFFECTS OF STRUCTURES. STRUCTURES CAN ACT TO TRAP THE CLOUD AND INCREASE THE CLOUD DIMENSIONS, THEREBY POSSIBLY REDUCING DOWNWIND CONCENTRATIONS AND INCREASING THE CLOUD'S LATERAL EXTENT. RECENT RESEARCH CONDUCTED BY CPP HAS SHOWN THAT THE TRAPPING AND I ...

CRC PROPOSES A DESIGN STUDY TO APPLY TWO DEVELOPMENTAL WRAP-AROUND FIN (WAF) TECHNIQUES TO AIR FORCE GUIDED MUNITIONS. THESE FLEXIBLE WAF DESIGNS DIFFER FROM CONVENTIONAL WAF'S IN THAT THEY BECOME STRAIGHT WHEN DEPLOYED. AS A RESULT THEY AVOID THE UNDERSIRABLE (AND DIFFICULT TO PREDICT AND TO MEASURE) AERODYNAMIC PROPERTIES OF CURVED WAF'S. MOST DESIGNERS OF GUIDED MUNITIONS HAVE AVOIDED WAF'S BEC ...

THE EAGLE GRID GENERATION CODE IS A WIDELY USED SOFTWARE TOOL FOR GENERATING COMPUTATIONALLY UNIFORM GRIDS THAT FIT IRREGULAR PHYSICAL DOMAINS. BASED ON ELLIPTIC GRID GENERATION, IT USES A BLOCKSTRUCTURED APPROACH TO ACCOMMODATE VERY IRREGULAR REGIONS AND POINT DISTRIBUTION FUNCTIONS TO REDUCE FLOW-SOLVER TRUNCATION ERROR. IT ALSO INCORPORATES AS EULER SOLVER FOR INVISCID FLOW CALCULATIONS. WHILE ...

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