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.
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Showing 1 to 20 of 20 for “"Blast Mitigation"”.
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Economical solutions to blast mitigation on bridges
Mitigating the energy created from a blast has been a topic of utmost importance in the terrorism-feared world of today. Main targets of concern are passageways that are significant to a specific area, such as bridges. These structures are expensive to construct and vulnerable to explosive loads …
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Analysis of blast mitigation strategies exploiting fluid-structure interaction
Blast attacks have become the most pervasive threat in both civil and military contexts. However, there is currently a limited understanding of the mechanisms of loading, damage and failure of structures, and injury to humans produced by blast. This thesis seeks to advance our current understanding …
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Blast mitigation strategies for vehicles using shape optimization methods
This thesis is concerned with the study of blast effects on vehicular structures. The specific problem of a point source blast originating under the vehicle hull is considered, and its impact on the solid body is measured in terms of the total impulse acting on the vehicle. Simplified …
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Feasibility and design of blast mitigation systems for naval applications using water mist fire suppression systems
… traveling through a structure. Currently these blast mitigation effects have only been demonstrated in small-scale shock tube tests and computer simulations. Uncertainty exists as to the scalability of such a system. The intention of this research is to investigate the applicability of such a …
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Shape optimization of lightweight structures under blast loading
Structural optimization of vehicle components for blast mitigation seeks to counteract the damaging effects of an impulsive threat on occupants and critical components. The strong and urgent need for improved protection from blast events has made blast mitigating component design an active research …
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The effect of venting configuration on the blast response of an aircraft unit load device
… aircraft unit load devices (ULDs) as a potential blast mitigation technique is investigated in this work. Damage to the ULD, such as large deflections or container rupture, from an internal explosion threatens to tear the aircraft skin and cause fuselage decompression. The loading within a luggage …
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A Novel Dual-Imaging Approach for Visualizing Multiphase and Droplet Interactions including Shock-Driven Flows
… in areas ranging from aerospace engineering to blast mitigation systems, where these interactions play a pivotal role in designing the relevant systems.</p>
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Development Of Lower Extremity Injury Criteria And Biomechanical Surrogate To Evaluate Military Vehicle Occupant Injury During An Explosive Blast Event
… injured body region following an AV mine or IED blast accounting for 26 percent of all combat injuries in OIF (Owens et al., 2007). Detonations occurring under the vehicle transmit high amplitude and short duration axial loads onto the foot-ankle-tibia region of the occupant causing injuries to …
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Study of an advanced helmet liner concept to reduce TBI : experiments & simulation using sandwich structures
… The majority of TBIs were caused by exposure to blast waves. Use of advanced body armor has decreased the number of fatalities due to impacts after the explosions, increasing the number of observed non-fatal brain injuries from the blast waves. A large number of TBIs due to impact hits are also …
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STRUCTURAL ASSESSMENT OF MULTIPLE STORY STEEL BUILDINGS SUBJECTED TO BLAST LOADS
… of Multiple Story Steel Buildings Subjected to Blast Loadsby: ANDREW APPELBAUMAbstract This research has been carried out in order to analyze the effects of blast loads on lateral force resisting systems in hardened multistory steel buildings. The results obtained are targeted towards improving …
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Facial protective devices for blast-induced traumatic brain injury mitigation
… response of a human head subjected to a blast. Finite element models of the helmet with and without faceshields and goggles were developed from geometries of the Advanced Combat Helmet and the Enhanced Combat Helmet provided by the Natick Soldier Research, Development and Engineering …
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A Homogenization Approach for Design and Simulation of Blast Resistant Composites
… have been successfully and extensively used in blast mitigation. This dissertation examines the use of the homogenization approach to design and simulate blast resistant composites. Three case studies are performed to examine the usefulness of different methods that may be used in designing and …
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Behavior of reinforced concrete column-beam joint subjected to close in blast loads with polyurea and FRP sheets
… concrete (RC) column-beam joint under close-in blast loads using finite element modeling in LS-DYNA with an Arbitrary Lagrangian-Eulerian (ALE) formulation. Failure is captured through element erosion based on maximum principal strain. The study employs concrete with a compressive strength of …
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Computational modeling of blast-induced traumatic brain injury
Blast-induced TBI has gained prominence in recent years due to the conflicts in Iraq and Afghanistan, yet little is known about the mechanical effects of blasts on the human head; no injury thresholds have been established for blast effects on the head, and even direct transmission of the shock …
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Fluid-filled helmet liner concept for protection against blast-induced traumatic brain injury
… survivability in combat has increased, but blast-induced Traumatic Brain Injury (TBI) has become a prevalent injury in the battlefield. Often referred to as the "signature wound" of the current U.S. conflicts, blast-induced TBI is not a very well understood injury. In an effort to gain more …
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Protection of High-Voltage Transformer Bushings and Other Brittle Structures Against Impact
… the surface of a bushing to absorb an explosive blast from a combined effect of high-velocity impact and internal pressure. Nature was used as a guide to select an appropriate polymer coating for blast mitigation. It turned out that small amounts of Line-X XS-100 applied on the surface of the …
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The response of singly curved fibre reinforced sandwich and laminate composite panels subjected to localised blast loads
… and laminate panels subjected to localised blast loads. The aim of the project was to investigate and compare the blast mitigation potential of each panel type and the influence of curvature on the response. Three radii of curvature were examined for both panel types, namely infinite (flat), …
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Multi-Fidelity Analysis and Optimization of Lightweight Structures Subject to Significant Fluid-Structure Interaction Effects
… containment structures to enhance their blast survivability while reducing their structural weight. Specifically, this thesis focuses on metallic foams, which feature an extended plastic plateau during which their cellular structure collapses due to wall buckling or yielding, followed by …
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An innovative protective jacket for structures subject to blast loads: A comprehensive experimental and simulation study
… of protective engineering and multi-hazard mitigation design has grown in recent years, the development of an effective structural protection system that aids in the preservation of life safety during blast events is an important topic of research in structural engineering. This protection …
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Evaluating the Use of Ductile Envelope Connectors for Improved Blast Protection of Buildings
… of enhanced, cost-effective solutions for the blast protection of structures. This study explores the feasibility of a simple, cost-effective building envelope connector that provides an energy absorbing mechanism for mitigating the effects of a blast event onto a building. The feasibility of …