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Showing 1 to 20 of 84 for “"energetic materials"”.
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Aerosol Synthesis of Energetic Materials
Item reinstated by Sarah Shreeves (sshreeve@illinois.edu) on 2013-01-22T11:00:17Z Item was in collections: University of Illinois Dissertations and Theses (ID: 204) Dissertations and Theses - Chemistry (ID: 676) No. of bitstreams: 2 Helmich_Richard.pdf: 10495587 bytes, checksum: …
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Fragmentation and reaction of structural energetic materials
Structural energetic materials (SEM) are a class of multicomponent materials which may react under various conditions to release energy. Fragmentation and impact induced reaction are not well characterized phenomena in SEMs. The structural energetic systems under consideration here combine aluminum …
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A Continuum Thermomechanical Model for Energetic Materials
The model is then simplified to a set of three model problems: the constant-volume thermal explosion, one-dimensional shear loading, and one dimensional longitudinal loading. These model problems were solved numerically using essentially non-oscillatory and total variation diminishing methods. The …
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Enhancing reactivity of aluminum-based structural energetic materials
… energy density and total energy output. These materials are also becoming useful in warhead casings compared to traditional inert materials because of their ability to enhance weapon output such as peak blast pressure and blast impulse. Aluminum is a good candidate for such enhanced blast …
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Particle packings and microstructure modeling of energetic materials
… the microstructure of particulate heterogeneous materials. In the first part of this dissertation, we present the current mathematical framework used for understanding the properties of particle packings, as well as the methods and algorithms we have developed to generate packings of frictionless …
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Improving reactivity of aluminum-based structural energetic materials
… improve reactivity in aluminum based structural energetic materials. This will be done by testing different alloy structures and various material inserts in structured explosive experiments. This study will also utilize heavy end confinement for all tests while also taking multiple pressure …
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Combustion Physics and Inverse Modeling of Energetic Materials
Energetic material combustion involves intricate multi-scale and multi-phase dynamics, where the interplay of chemical reaction and transport processes results in complex wave patterns across a wide range of length scales from nano to millimeter. Our limited fundamental understanding of these …
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Thermal Interaction of Inert Additives in Energetic Materials
Energetic materials are used for a variety of applications, including airbag deployment and solid rocket fuels, that require high energy density and various energy release rates. The energy release rate, determined by how fast the material burns, is often thought to be proportional to the bulk …
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Molecular Modeling Of Energetic Materials And Chemical Warfare Agents
<p>Contamination of military sites by energetic materials and chemical warfare agents is a growing problem. To avoid health hazards associated with these compounds, it is necessary to decontaminate or remediate the contaminated sites. Effective decontamination requires knowledge of environmental …
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Ignition and combustion behaviors of nano-composite energetic materials
… has recently shown the potential for enhanced energetic behavior of thermites. In this study, the ignition sensitivity of an aluminum molybdenum-trioxide (AI/M0O3) composite mixture was examined. Laser ignition experiments were performed to determine the ignition time and burn rates of newly …
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Optimization of enhancements to aluminum-based structural energetic materials
Warhead casings are most often made of steel due to its low cost, high strength, good manufacturability, and ability to produce dense high-speed fragments. However, inert steel does not improve blast wave characteristics. In fact, it significantly reduces peak blast pressure and impulse as energy …
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Thermo-mechanical characterisation of energetic materials for additive manufacture
… an investigation of the additive manufacture of energetic materials such as polymer bonded explosives and composite propellant. The work focuses on the use of extrusion methods to print the materials as uncured pastes comprising a high volume fraction of solid energetic particles dispersed in a …
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Computational modeling of advanced, multi-material energetic materials and systems
… the reactive mechanism of different explosive materials; study how detonation waves travel through them and determine how to initiate explosives with the smallest amount of booster material. These types of problems are numerically challenging to model and require multiple components that …
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Evaluation of velocity interferometry for high energetic materials using a VISAR
In this study, a cylinder expansion test was performed using a square prism OFHC copper with a cylindrical extrusion filled with Comp B explosive charge. A Valyn VISAR was used as a measuring tool to record the expansion history of the cylinder by Doppler shift of the light reflected off its …
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Microwave enhancement of energetic materials combustion through gas-phase flame interactions
<p>Traditionally, energetic materials’ energy output has been limited to being controlled via formulations and, once an energetic material is manufactured, dynamic change of energy output during combustion is difficult. These limitations are specific to all types of energetic materials, including …
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Thermomechanical and Numerical Modeling of Energetic Materials and Multi-Material Impact
Because the framework in which the simulation tool is developed is quite general, we expect a wide application of our model to many challenging multi-material physics problems.
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Optical combustion measurements of novel energetic materials in a heterogeneous shock tube
… rates of the system. Mechanically alloyed energetic systems have potential to improve combustion behavior as compared to their pure metal counterparts. The alloys can also be tailored for specific applications by varying the compound constituents. Ti-B and Al-I2 mechanically alloyed …
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Mesoscale Computational Analysis on the Reactivity of Heterogeneous Energetic Materials with Electromechanical Properties
… was performed in the past to investigate how energetic materials (EM) ignite via thermomechanical dissipation produced by viscoplastic deformation, friction, and fracture. Yet, little is known regarding the other types of excitation leading to ignition. Electromechanically induced dissipation …
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Computational Modeling and Thermodynamic Simulation Approaches for the Analysis of Highly Energetic Materials
L'abstract è presente nell'allegato / the abstract is in the attachment
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