Award Data

"The objective of this project is to develop and validate a 2nd generation crack-growth prediction methodology for cold-worked fastener holes. The methodology will be based on a three-dimensional weight function, and will handle cracks growing from theedge of the hole, as well as cracks initiating in the residual tension zone away from the hole. A predictive capability, based on probabilistic fa ...

"We propose to develop a heat flux sensor that can be used to estimate the temperature and heat flux on the far side of a wall as a function of time. The configuration of the sensor is specifically designed to minimize the sensor's impact on thetemperature and heat flux boundary conditions on the sensor's side of the wall, while allowing for both the capability of measuring very high heat fluxes ...

"Fretting is a wear phenomenon that occurs between two mating surfaces: it is adhesive in nature, and vibration is its essential causative factor. Usually fretting is accompanied by corrosion. In general, fretting occurs between two tight fitting surfacesthat are subjected to a cyclic, relative motion of extremely small amplitude. Fretted regions are highly sensitive to fatigue cracking. Under fre ...

"Fretting is a wear phenomenon that occurs between two mating surfaces: it is adhesive in nature, and vibration is its essential causative factor. Usually fretting is accompanied by corrosion. In general, fretting occurs between two tight fitting surfacesthat are subjected to a cyclic, relative motion of extremely small amplitude. Fretted regions are highly sensitive to fatigue cracking. Under fre ...

"A multi-channel transmit array is to be developed for high-speed digital communications and radar applications. Digital beamforming (DBF) will be combined with direct digital synthesis (DDS) waveform generation to achieve a system capable of using bothwaveform diversity and spatial diversity. Multiple simultaneous transmit beams will be generated that may be configured and scanned digitally. Usin ...

"The Air Force is pursuing aircraft and satellite-based high power laser systems to engage and destroy missiles at long ranges (hundreds to thousands of kilometers). A precision inertial reference unit (IRU) is critical to successful operation of longrange, high power laser systems for missile defense. The IRU enables the system to accurately point the payload telescope and attached tracking sen ...

"One of the critical capabilities to enhance the availability and performance of C4I systems for Homeland Defense and other major Air Force initiatives (e.g., DMFE, TAS, DICE, Broadsword, JBI, SSW and BP) is indexing and retrieval of large multimedia,multi-source information. Current indexing and retrieval techniques in these systems are based on limited sets of keywords and simple lookup tables. ...

"One of the critical capabilities to enhance the availability and performance of C4I systems for Homeland Defense and other major Air Force initiatives (e.g., DMFE, TAS, DICE, Broadsword, JBI, SSW and BP) is indexing and retrieval of large multimedia,multi-source information. Current indexing and retrieval techniques in these systems are based on limited sets of keywords and simple lookup tables. ...

"The need for innovative combined cycle engines for Space Access and hypersonicvehicles leads the Air Force design engineers to the requirement for analysistools that provide higher levels of fidelity than are available today. Theengines for these vehicles, rather than being separate systems, are integratedsystems that share inlets, nozzles and in many cases, combustor flow paths.Because analytica ...

"Brimrose Corporation has identified 0.75, 1.0, 1.5 and 1.91 eV band gap III-V semiconductor materials, lattice matched to InP for producing high efficiency 4- junction solar cells for space application. Phase I objective are follows: (1) Optimize theepitaxial growth of 0.75 and 1.0 eV materials and tunnel junction inter connecting these two band gap solar cells and fabricate a high efficiency si ...