Effect of ageing on the calibration of ballistic gelatin
| Autor: | Samantha Alda Rodrigues, A Pullen, Jason Guey, David C. Kieser, B Shaw |
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| Rok vydání: | 2018 |
| Předmět: |
Time Factors
food.ingredient Materials science Ballistic gelatin Significant difference Potential effect 030208 emergency & critical care medicine General Medicine Penetration (firestop) Depth of penetration Models Biological Gelatin 03 medical and health sciences 0302 clinical medicine food Ageing Calibration Materials Testing Wounds Gunshot 030216 legal & forensic medicine Biomedical engineering |
| Zdroj: | Journal of the Royal Army Medical Corps. 164:277-280 |
| ISSN: | 2052-0468 0035-8665 |
| DOI: | 10.1136/jramc-2018-000924 |
| Popis: | PurposeBallistic gelatin is commonly used as a validated surrogate for soft tissue during terminal ballistic testing. However, the effect of a delay between production and testing of a gelatin mould remains unknown. The aim of this study was to determine any potential effects of ageing on ballistic gelatin.MethodsDepth of penetration (DoP) of 4.5 mm spherical fragment simulating projectiles was ascertained using mixtures of 10%, 11.25% and 20% Type A 250 Bloom ballistic gelatin. Testing was performed daily for 5 days using velocities between 75 and 210 m/s. DoP at day 5 was statistically compared with day 1, and net mass change was recorded daily.ResultsNo significant difference was found for DoP observed with time in any of the samples (P>0.05). Spearman correlation was excellent in all moulds. The moulds with known standard calibrations remained in calibration throughout the study period. Mass loss of less than 1% was noted in all samples.ConclusionMass loss was the only quantifiable measure of changes in the blocks with time, but did not correlate with any changes in DoP. This may provide reassurance when undertaking such testing that an inadvertent delay will not significantly alter the penetration properties of the mould. Future research is recommended to determine any potential effect on the mechanical properties of gelatin at higher velocity impacts and whether the calibration corresponds to an adequate simulation under such conditions. |
| Databáze: | OpenAIRE |
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