کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6552564 | 160436 | 2014 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental investigation of the mechanical properties of brain simulants used for cranial gunshot simulation
ترجمه فارسی عنوان
بررسی تجربی خواص مکانیکی شبیه سازهای مغز مورد استفاده برای شبیه سازی گلوله های قدامانی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
The mechanical properties of the human brain at high strain rate were investigated to analyse the mechanisms that cause backspatter when a cranial gunshot wound occurs. Different concentrations of gelatine and a new material (M1) developed in this work were tested and compared to bovine brain samples. Kinetic energy absorption and expansion rate of the samples caused by the impact of a bullet from .22 air rifle (AR) (average velocity (uav) of 290 m/s) and .22 long rifle (LR) (average velocity (uav) of 330 m/s) were analysed using a high speed camera (24,000 fps). The AR projectile had, in the region of interest, an average kinetic energy (Ek) of 42 ± 1.3 J. On average, the bovine brain absorbed 50 ± 5% of Ek, and the simulants 46-58 ± 5%. The Ek of the .22 LR was 141 ± 3.7 J. The bovine brain absorbed 27% of the .22LR Ek and the simulants 15-29%. The expansion of the sample, after penetration, was measured. The bovine brain experienced significant plastic deformation whereas the gelatine solution exhibited a principally elastic response. The permanent damage patterns in the M1 material were much closer to those in brain tissue, than were the damage patterns in the gelatine. The results provide a first step to developing a realistic experimental simulant for the human brain which can produce the same blood backspatter patterns as a human brain during a cranial gunshot. These results can also be used to improve the 3D models of human heads used in car crash and blast trauma injury research.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forensic Science International - Volume 239, June 2014, Pages 73-78
Journal: Forensic Science International - Volume 239, June 2014, Pages 73-78
نویسندگان
Milad Soltanipour Lazarjan, Patrick Henry Geoghegan, Mark Christopher Jermy, Michael Taylor,