TY - JOUR
T1 - Ballistic limit estimation approaches for ballistic resistance assessment
AU - Tahenti, Beya
AU - Coghe, Frederik
AU - Nasri, Rachid
N1 - Publisher Copyright:
© 2020, DESIDOC
PY - 2020
Y1 - 2020
N2 - The armour technologist conducts ballistic impact testing either for evaluating armour materials and systems or for studying material's defeating mechanism. Most standards make use of the ballistic limit velocity for ballistic assessment. This is the bullet impact velocity that leads to the protection perforation in 50 per cent of the cases. Various models have been emerged to estimate this key metric. The present article summarises the popular models developed for ballistic limit estimation. An attempt is made to point out models' strength and weakness. First, the experimental set-up used for that goal is displayed. Next, a concise overview of ballistic limit estimation methods is presented. Lastly, a discussion is dedicated to model's comparison and analysis. This literature survey reveals that the main drawback of already existing methods is that they are purely statistical. Moreover, existing methods are based on the normality assumption of perforation velocities which tends from -infinity to infinity. The main conclusion of this survey is that the presented methods offer a comparable accuracy in estimating the ballistic limit velocity. However, a given variability is remarked when extreme values estimation is of interest, impact velocities leading to low and high perforation probability. Finally, existing models' performances decay with the reduction of the experimental sample size which represent a constraining requirement in ballistic resistance assessment.
AB - The armour technologist conducts ballistic impact testing either for evaluating armour materials and systems or for studying material's defeating mechanism. Most standards make use of the ballistic limit velocity for ballistic assessment. This is the bullet impact velocity that leads to the protection perforation in 50 per cent of the cases. Various models have been emerged to estimate this key metric. The present article summarises the popular models developed for ballistic limit estimation. An attempt is made to point out models' strength and weakness. First, the experimental set-up used for that goal is displayed. Next, a concise overview of ballistic limit estimation methods is presented. Lastly, a discussion is dedicated to model's comparison and analysis. This literature survey reveals that the main drawback of already existing methods is that they are purely statistical. Moreover, existing methods are based on the normality assumption of perforation velocities which tends from -infinity to infinity. The main conclusion of this survey is that the presented methods offer a comparable accuracy in estimating the ballistic limit velocity. However, a given variability is remarked when extreme values estimation is of interest, impact velocities leading to low and high perforation probability. Finally, existing models' performances decay with the reduction of the experimental sample size which represent a constraining requirement in ballistic resistance assessment.
KW - Ballistic limit
KW - Ballistic resistance
KW - Normal law
KW - Perforation probability
UR - http://www.scopus.com/inward/record.url?scp=85082763814&partnerID=8YFLogxK
U2 - 10.14429/dsj.70.14122
DO - 10.14429/dsj.70.14122
M3 - Article
AN - SCOPUS:85082763814
SN - 0011-748X
VL - 70
SP - 82
EP - 89
JO - Defence Science Journal
JF - Defence Science Journal
IS - 1
ER -