Award Data

Ultra-high-performance concrete (UHPC) offers superior properties for structural applications. Existing UHPC design and production methods employ special materials and mixers. This project is developing mix design and fabrication methods for reliable production of UHPC with local materials and facilities. The Phase I project devised material selection criteria, proportioning methods and mixing pro ...

ABSTRACT: Several current fighter aircraft with external store configurations persistently encounter Limit Cycle Oscillation (LCO) problems. A fast and accurate aeroelastic prediction is required to identify the critical LCO configurations given the massive number of aircraft with store combinations short-time frame demanded by rapid military responses when facing todays ever-changing internation ...

ABSTRACT: Energetic composite materials comprise crystalline energetic particles embedded in a polymer matrix. There is a need to gain insight into the microstructure and damage mechanisms of energetic composites via nondestructive evaluation. Applications of x-ray computed micro-tomography to resolve the microstructure of energetic composites are challenged by the low density gradient between th ...

ABSTRACT: High throughput quality control measurement methods are of critical importance for many fields, including agriculture, automobile manufacture, and the liquid crystal display industry. For instance, spectral imaging can quantify chemical identification and localization of compounds on surfaces. Meanwhile, polarimetric imaging can be used to quantify structural aspects of a surface, such ...

ABSTRACT: The proposal overall objective is to develop a rigorous understanding of the electronic structure and semiconductor-laser application related physics properties of the novel III-V-Bi material system. The sophisticated, graphical user interface driven software tools already established for standard III-V semiconductor heterostructures will be extended and generalized to become applicabl ...

ABSTRACT: The ability to convert extreme aerodynamic heating into electricity via thermoelectric generators presents a unique opportunity to leverage this otherwise undesirable condition. The harvested energy can be used to power the significant electrical demand of a hypersonic/long range vehicle while also aiding in managing high temperatures. To address this need for an high temperature thermoe ...

ABSTRACT: The next generation of hypersonic and reentry vehicles being designed for the Department of Defense (DoD) applications will require advanced Thermal Protection System (TPS). While new TPS shields are under development, a key difficulty is the ability to predict and diagnose TPS performance. ElectroDynamic Applications (EDA) has been developing an optical diagnosticfor use during testi ...

ABSTRACT: ZONA proposes to develop a comprehensive virtual flight test software system by enhancing the capabilities of the ZONA's Stick-To-Stress Dynamic Flight Simulation (STS-DFS)"previously developed under AFRL contractual support. The current STS-DFS combines flight dynamic model and a nonlinear aeroelastic solver constructed based on neural net-based aerodynamic reduced order model (RO ...

ABSTRACT: The goal of this project is to develop theoretical models for electrode erosion in high-pressure arcs and incorporate them into computational tools for simulations of arc heaters. The complexity of the electrode material removal process is associated with the multi-phase nature of the arc-electrode interactions, melting and vaporization of the electrodes near the arc foot. Available mod ...

ABSTRACT: The overall goal of the proposed effort is to develop and demonstrate a general-purpose, fast, and reliable management and learning software tool for analyzing massive data sets generated by dynamic multi-disciplinary simulations. The salient elements of the software tool are: (1) an innovative combination of Proper Orthogonal Decomposition (POD) and advanced feature detection technique ...