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Blast Overpressure Effects of PE4 on a Simplified Rigid Torso



Explosions, whether accidental or intentional, can cause severe injuries and even death. 12% of 4765 patients evaluated from the Joint Theater Trauma Registry, between 2003 and 2006, sustained Primary Blast Injuries, with lung injury resulting in a significant rate of blast mortality. Much of the existing blast injury data, used for the development of injury criteria models, was obtained from animal testing with sheep and subsequently extrapolated to humans using scaling techniques. More recently, mathematical, experimental and numerical models have been developed and employed to investigate blast injury. There are currently three models used for the investigation of blast related injury severity, however the precise physical mechanism which leads to injury still remains uncertain. This study aims to evaluate and compare the results of these three models. In this study, blast tests were conducted using the Blast Test Device and the results were used to predict primary blast lung injury based on a range of blast loading conditions. Firstly, the results were investigated using the Bowen curves to predict primary blast injury. Secondly, injury results for the BTD were calculated using Axelsson and the Injury 8.3 (Stuhmiller) injury prediction program. In general, all of the models predicted appropriate levels of injury for the body and these predictions were comparable to the accepted injury levels for blast loads from 1kg PE4. This study evaluated the three models that predict primary blast injury, an important consideration for the improvement of blast protection as it provided a comparison between the three models.


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