Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"high explosive"”.
-
Multispectral optical depth measurements in post-detonation high explosive fireballs
… in post-detonation fireballs from five different high explosives. PETN, HMX-based PBXN-5, RDX, an 80% RDX/20% aluminum mixture, and PETN-based Primasheet 1000 explosives were detonated in a 2.18L explosive test chamber. Charges were 125mg or 250mg explosive output pellets, each detonated by an …
-
Material study on the fragmentation of high explosive, hemispherical shells: Diagnostics techniques and results
The student, Matthew Bielawski, submitted this Thesis for approval on 2024-12-10 at 12:26.
-
A study in the cutting of copper cylinders using high explosive detonation wave interactions
Thesis (S.M. and S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
-
Thermal and physical structures of high explosive fireballs through optical thermometry and high-speed imaging
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
-
Analyzing decomposition of diisopropyl methylphosphonate (DIMP) in high-explosive detonations using absorption spectropscopy and gas concentration measurements
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
-
Vibrational energy transfer in condensed high explosives: Nitromethane
… relaxation and multiphonon up-pumping in a high explosive nitromethane (NM). The relationships between these energy transfer processes and shock wave-induced initiation to detonation are discussed. The principal mechanism of vibrational cooling in solid NM below 150 K is shown to be a …
-
A full-engulfment engineering model, and its experimental and numerical verification, for the response of a rigid body to ground-shock
… model was also tested against the results of a high-explosive test in sand, and a high explosive test in a competent shale, by treating the ground motion instrument canisters on the tests as rigid bodies. Again the model was found to be accurate, and accounted for the differences observed …
-
Numerical modelling of explosively loaded steel V plates using the Jones-Wilkins-Lee equation of estate
… require interaction with the enemy, and it has a high percentage of fatalities. Because of this, mine warfare has been used extensively across the world during conflicts and therefore there is a need for mine-detecting and mine-protected vehicles. The systems of protection of these vehicles need …
-
Numerical Study of Energy Loss Mechanisms in Oscillating Underwater Explosion (UNDEX) Bubbles
… flow problems with applications suited for high-explosive detonation was investigated for underwater explosion (UNDEX) events. The problem of over-prediction for long-term UNDEX bubble behavior in modern hydrocodes that is known to be due to neglected secondary energy-loss mechanisms is …
-
The effects of case mass to charge mass ratio on aluminum-based structural energetic materials
High explosives used in warfighting are generally encased in a steel case. The steel shell not only provides structure to the weapon, but it also contributes significantly to the total damage by adding shrapnel to the blast. Steel is commonly used due to its low cost, high strength, and destructive …
-
Explosive initiation of various forms of the Ti/2B energetic system
… such as aluminum, are commonly added to explosives in order to generate higher energy release and overpressures. However, these types of additives are ineffective in enabling a satisfactory level of control over the weapon’s blast effects. Metal-based reactive materials (RM) are of …
-
Dynamics and failure analysis of architectural glazing subjected to blast loading
… and threats are on the rise all over the world. High explosive detonations cause extensive damage to both the target structure and nearby buildings. It is estimated that the majority of nonfatal injuries from bomb blasts result from flying fragments from architectural glazing. Use of laminated …
-
Theory of Instability and Nonlinear Evolution of Self -Sustained Detonation Waves
… multi-dimensional detonation waves in arbitrary explosive media as intrinsic properties of the reactive Euler equations in the embedded sonic surface, which is a characteristic surface. The conditions generalize previously known sonic conditions for self-sustained detonations. We investigate the …
-
Enhancing reactivity of aluminum-based structural energetic materials
… added in applications such as propellants and explosives to increase 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 …
-
Explosive initiation of tungsten based reactive materials in air
… of reactive materials (RM’s) initiated by a high explosive detonation. High speed pressure, shadowgraph imaging, pyrometry and spectroscopy diagnostics were developed and used concurrently for tests conducted in these facilities. Well known thermite, intermetallic and reactive metal compounds …
-
Shock wave interactions at explosive/metallic interfaces
<p>"Metallic tubes filled with C-4 high-explosive and constructed of either aluminum or copper were tested during this study of high strain rate effects within thin metal cylinders performed as an adjunct to helical flux-compression generator research at the University of Missouri-Rolla. This study …
-
Instability of steady and quasi-steady detonations
… detonation in a rectangular channel. High-order convergent numerical simulation schemes for these configurations are derived and used to study the linear and nonlinear stability of detonations. Shock-fitted numerical simulation is used to study the two-dimensional instability of steady …
-
The German air raids on Belfast of April and May 1941, and their consequences
… - the droning of aircraft engines, the crump of high explosive bombs and heavy anti-aircraft shells, the splutter of machine guns, the crackling of fires caused by incendiaries and above all the sound of human voices.<br/><br/>Still many people refused to take cover. In areas not directly …
-
Investigation of enhanced aluminum casings for underwater explosives and development of spectroscopic techniques for measuring temperature in environments relevant to underwater ordnance
Enhanced aluminum casings for high explosives were examined both experimentally and theoretically. The experimental analysis utilized aluminum cylinders with linear shaped charges embedded on the surface. The cavities produced jets which outperformed the regions on the cylinder without cavities in …
-
Computational modeling of advanced, multi-material energetic materials and systems
… simulation tool that can aid in the design of explosive devices by numerically investigating 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 …
Page 1 of 2