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THICK COMPOSITE PRESSURE HULLS MADE TO DATE HAVE EXHIBITED POOR COMPRESSIVE STRENGTH WHEN COMPARED TO THIN LAMINATED ALLOWABLES. A TRANSVERSE TENSILE FAILURE MECHANISM IS THEORIZED WHICH IS CONSISTENT WITH PREVIOUS TEST RESULTS. THE USE OF ELASTOMERIC INTERLEAVES TO DIVIDE THE THICK LAMINATE INTO A SERIES OF THIN SUBLAMINATES IS PROPOSED AS A MEANS TO INCREASE COMPRESSIVE STRENGTH. THIN GR-EPOXY L ...

SONAR WINDOWS BASED UPON GLASS-REINFORCED EPOXY COMPOSITES CURRENTLY SHOW UNSATISFACTORY PERFORMANCE IN ARCTIC ENVIRONMENTS AS A RESULT OF HIGH ACOUSTIC INSERTION LOSSES AND SUSCEPTIBILITY TO DAMAGE UPON IMPACT OR ICE LOADING. FOSTER-MILLER PROPOSES TO INVESTIGATE NEW ACOUSTIC MATERIALS THAT WILL ENABLE NEW COMPOSITE WINDOW DESIGNS TO SATISFY BOTH THE ACOUSTIC AND IMPACT STRENGTH DEMANDS. WE WILL ...

A NEW CLASS OF MATERIAL, ORGANOSILICONS, HAVE THE POTENTIAL TO PROVIDE THE NAVY WITH A "SINGLE FAMILY" SYSTEM OF INSULATIONS THAT CAN BE USED FOR ALL SHIPBOARD THERMAL, ACOUSTICAL AND FIRE BARRIER APPLICATIONS. THE NEED FOR SUCH A MATERIAL ARISES FROM THE FACT THAT AS MANY AS SIX DIFFERENT INSULATING MATERIALS ARE USED ON TODAY-S SHIPS. THE ATTENDANT LOGISTICAL BURDEN ASSOCIATED WITH THIS VARIETY ...

WE PROPOSE TO IDENTIFY ADVANCED ZERO-HALOGEN POLYMERS AND THEIR BLENDS THAT WILL SUBSTANTIALLY IMPROVE THE PERFORMANCE OF NAVY SHIPBOARDCABLES. IN THIS PROJECT, WE WILL EVALUATE CANDIDATE REPLACEMENT MATERIALS, INCLUDING BOTH COMMERCIALLY AVAILABLE AND STATE-OF-THE-ART THERMOPLASTICS AS WELL AS NOVEL BLENDS. A WEIGHTED TRADEOFF ANALYSIS WILL BE CONDUCTED TO DETERMINE THE MOST SUITABLE MATERIALS FO ...

LIGHTWEIGHT MATERIALS WHICH CAN PROTECT EQUIPMENT AND STRUCTURES FROM THE DAMAGING EFFECTS OF UNDERWATER EXPLOSIONS WOULD HAVE MANY APPLICATIONS ON SUBMARINES AND SURFACE SHIPS. CLOSED CELL RIGID EPOXY FOAM WITH APPROXIMATELY 55% AIR VOID CONTENT BY VOLUME HAS BEEN SHOWN TO ATTENUATE THE PEAK PRESSURE IN SHOCK WAVES DUE TO AN UNDERWATER EXPLOSION. THE OBJECTIVE OF THIS PHASE I FEASIBILITY STUDY IS ...

THE OBJECTIVE OF THE PROPOSED EFFORT IS TO DEVELOP AND SUPPLY AN AEROTHERMAL ANALYSIS COMPUTER PROGRAM TO PREDICT SHAPE CHANGE AND INTERNAL DISTRIBUTIONS FOR ADVANCED MANEUVERING REENTRY BODY CONFIGURATIONS. THE TEMPERATURE APPROACH WILL BE TO UPGRADE THE EXISTING MTSCT NOSETIP AND FLAP COMPUTER CODES. THESE CODES WERE DEVELOPED BY TEXTRONDEFENSE SYSTEMS AND GENERAL APPLIED SCIENCE LABORATORIES UN ...

THE COST OF REPAIRING AND REPLACING PUBLIC PROPERTY DAMAGED BY SHALLOW TREE ROOTS TOTALS MILLIONS OF DOLLARS ANNUALLY. THE UNEVEN GRADE OF THESE SIDEWALKS ALSO PRESENTS A LIABILITY FOR MUNICIPALITIES. THE PROBLEM IS LIKELY TO BE COMPOUNDED BY THE PROPOSED PLANTING OF AN ADDITIONAL 60 MILLION URBAN TREES. WE HAVE IDENTIFIED A POPULATION OF SEEDLING TREES WITH KNOWN ROOT GROWTH CHARACTERISTICS, SPAN ...

CURRENT METHODS IN MOTOR CONTROL HAVE PROBLEMS DEALING EFFECTIVELY WITH HIGHLY VARIABLE ENVIRONMENTS AND SENSORY-MOTOR PARAMETERS. THE PROPOSED WORK OVERCOMES SOME OF THESE DIFFICULTIES BY BUILDING A NEURAL CONTROLLER THAT LEARNS ADAPTIVE MOTOR CONTROL FROM ITS OWN EXPERIENCE. THE OBJECTIVE OF THE PROPOSED PHASE I STUDY IS TO IMPLEMENT A SINGLE-JOINTED ARM AND CONTROLLER FOR POSITIONING UNFORESEEN ...

OPTRA PROPOSES THE DEVELOPMENT OF A LASER DOPPLER FUEL FLOWMETER WITH ZERO PRESSURE DROP. THE SENSOR WILL USE A TECHNIQUE SIMILAR TO CONVENTIONAL LASER DOPPLER VELOCIMETRY (LDV) TO DIRECTLY MEASURE FLUID VELOCITY AT THE CENTER OF THE FUEL LINE. THE NON-INTRUSIVE SENSOR USES A SOLID STATE LASER DIODE SOURCE AND SILICON DETECTORS SO THAT A COMPACT, RUGGED, AND RELATIVELY LOW COST PACKAGE COULD HE DE ...

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