A NOVEL APPROACH FOR EVALUATING THE BALLISTIC PERFORMANCE OF INNER PROTECTIVE LINERS
Inner protective liners have currently become an essential part of armor design of almost all protected land platforms. Consequentially, their ballistic performance has been a subject of significant research. Yet, the Authors were the first to enlighten in Ref. 1 the crucial necessity of liners in oblique impact incidents of perforation by overmatching threats. Relative to normal impact, oblique impacts expose the crew and vehicle to severer survivability risks, due to the widened spread in space of the ejected fragments. Further insight into the oblique impact mechanism shows, that the fragment cone is essentially composed of contributions of two fragment clouds. The primary cloud consists of fragmentation pushed forward in direction of perforation line of sight. Additional fragments, resulting from base plate material exiting almost normally to the structures rear surface, constitute a secondary cloud. The composition of these two clouds generates an integrated, highly asymmetric fragmentation cone. This cone has a significantly wider angle as shown in Ref. 1, thus posing a tougher challenge for armor designers. Ref. 1 also describes an instrumented, computerized ballistic test simplified method, developed by the Authors as part of their research on the subject. The proposed setup, consisting of a pair of flat witness plates, captures all fragment hits. However, this method has been found to pose some experimental difficulties when implemented. Recently, the Authors developed a novel experimental approach for evaluating the fragmentation spread in oblique impacts. The new concept utilizes a single arched (i.e. radial curved) witness-plate, instead of the two flat ones. The new evaluation procedure is described and six relevant test cases are exposed and discussed. The test case matrix facilitates isolating the aspects of attack angle, liner protection, and witness-plate configuration. The computerized analysis of the results provides further insight into the effect of behind-armor debris, and assists in further R&D of protective liner design and applications.
Moshe Ravid Nimi Shapira Shlomi Galperin Shornron Computing Amit Viesel Asaf Borenshtein Felix Aizik Yoav Hirschberg
Rimat Advanced Technology Ltd. 8b Simtat Hayerek st. Hod Hasharon, 45264, Israel POB 64, Peduel, 71940, Israel Plasan Ltd. MP Merom Hagalil, 13870, Israel
国际会议
25th International Symposium on Ballistics(第25届国际弹道会议)
北京
英文
1010-1019
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）