Joint Technical Coordinating Group on Aircraft Survivability. Interlaboratory Ballistic Test Program.
Interim rept. FY93-FY94,
ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE
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Analysis of experimental data from interlaboratory ballistic tests indicate that results from different facilities are not fully comparable for each of the two armor materials tested. The Materials Directorate of the Army Research Laboratory ARL-MD provided each of the nine laboratories participating in this program with a set of metallic armor panels and a set of macrocomposite armor panels consisting of a ceramic adhesively bonded to Kevlar reinforced plastic. ARL-MD stipulated the velocity for the first projectile fired at each set of armor panels and an obliquity of 0 deg. The lead test engineer at each laboratory selected all subsequent velocities. Each laboratory shot a series of ARL-MD provided U.S. 0.50 caliber armor piercing AP M2 projectiles at the panels and calculated a V50 protection ballistic limit PBL in accordance with MIL-STD-662E. In this report, we present the results from each laboratory for both armor panel types on which we performed two different statistical analyses. We also include a series of recommendations for improving the reproducibility of interlaboratory ballistic test data. MM
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