Abstract
An experimental study on energy absorption capabilities and strain rate sensitivity of ordnance gelatine was performed. Strain energy density under quasi static compression and moderate strain rate impact tests was compared. In the study two types of material were tested, bulk ordnance gelatine and polymeric open-cell meshwork filled with ordnance gelatine. From the results a significant strain-rate effect was observed in terms of ultimate compressive strength and strain energy density. In comparison of the deformation behaviour under quasi static conditions and drop weight test the difference was very significant, however slight increase in both strength and strain energy density was observed even between different impact energies and velocities during the impact testing. The peak acceleration was significantly reduced in polymer meshwork filled by gelatine in comparison to the bulk gelatine.
Highlights
IntroductionIn the engingeering applications in the field of ballistic and blast protection, passive safety systems in vehicles (automotive, railway vehicles) the impact energy dissipation is among the crucial properties [1]
In the engingeering applications in the field of ballistic and blast protection, passive safety systems in vehicles the impact energy dissipation is among the crucial properties [1]
Deformation response of ballistic gelatine blocks under moderate impact loading is described in this paper in terms of peak acceleration during the impact as well as total kinetic energy dissipation
Summary
In the engingeering applications in the field of ballistic and blast protection, passive safety systems in vehicles (automotive, railway vehicles) the impact energy dissipation is among the crucial properties [1]. One of the possible solutions to achieve such capabilities is to utilise cellular solids in conjunction with strain rate sensitive filling [2]. In this study experimental investigation on strain rate sensitivity at moderate strain rates as well as the interaction of the cellular solid and viscous filling is described. The ordnance (ballistic) gelatine is widely used as tissue simulant for assessment of damage of tissues induced by bullets [3]. Strain rate sensitivity under compressive loading was reported as well [4]. Deformation response of ballistic gelatine blocks (plain and reinforced with polymeric meshwork) under moderate impact loading is described in this paper in terms of peak acceleration during the impact as well as total kinetic energy dissipation
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