نتایج جستجو برای: blast pressure
تعداد نتایج: 428914 فیلتر نتایج به سال:
Blast wave loading pathways in heterogeneous material systems-experimental and numerical approaches.
Blast waves generated in the field explosions impinge on the head-brain complex and induce mechanical pressure pulses in the brain resulting in traumatic brain injury. Severity of the brain injury (mild to moderate to severe) is dependent upon the magnitude and duration of the pressure pulse, which in turn depends on the intensity and duration of the oncoming blast wave. A fluid-filled cylinder...
BACKGROUND The widespread use of explosives by modern insurgents and terrorists has increased the potential frequency of blast exposure in soldiers and civilians. This growing threat highlights the importance of understanding and evaluating blast injury risk and the increase of injury risk from exposure to repeated blast effects. METHODS Data from more than 3,250 large animal experiments were...
Traumatic brain injuries (TBI) caused by improvised explosive devices (IEDs) affect a significant percentage of surviving soldiers wounded in Iraq and Afghanistan. The extent of a blast TBI, especially initially, is difficult to diagnose, as internal injuries are frequently unrecognized and therefore underestimated, yet problems develop over time. Therefore it is paramount to resolve the physic...
Personnel injury from flying glass produced during an explosion accident can represent a significant hazard, often in excess of hazards due to airblast, primary fragments, building collapse, and secondary fragments. The permissible overpressure in Inhabited Building Distance (IBD) from a Potential Explosion Site (PES) is 1.2 psi. This pressure is sufficient to cause failure of most windows in c...
BACKGROUND : Injuries from combat and terrorist explosions are increasing worldwide. As such, physicians can expect to treat more patients with complex and unique patterns of injury produced not only by fragments and blunt trauma, but also by high-pressure air expanding from the detonation center. DISCUSSION : Tissue damage from the blast wave or primary blast injury can be an important cause...
Air blast-induced traumatic brain injuries (TBIs) represent a significant percentage of military personnel injuries observed in Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF). Prevalence of blast-induced TBIs is attributed to several factors, including improved body armor, improved diagnostic techniques, greater awareness, and the increased threat of attack by improvised exp...
Blast exposure is associated with traumatic brain injury (TBI), neuropsychiatric symptoms, and long-term cognitive disability. We examined a case series of postmortem brains from U.S. military veterans exposed to blast and/or concussive injury. We found evidence of chronic traumatic encephalopathy (CTE), a tau protein-linked neurodegenerative disease, that was similar to the CTE neuropathology ...
Primary blast injury affects the gas-containing structures of the body. Damage to the lungs with resultant respiratory insufficiency and arterial embolization of air from alveolar pulmonary venous fistulae is the predominant cause of morbidity and mortality following high-level blast exposure. In an effort to generate a widely applicable damage-risk criterion for thoracic injury from blast we a...
6.01 Surface and shallow undersion, as functions of the distance from ground bursts are defined as those in ground (surface) zero \(§ 2.34 footnote), which either the fireball or the hot, can then be obtained from the curves high-pressure gases generated by the given at the end of Chapter III. The cube explosion intersect or break through the root scaling law described there can be earth's surf...
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