Testing of Body Armor Materials Phase III (2012) / Chapter Skim
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2 Overview of Body Armor
2 Overview of Body Armor
Pages 25-33
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From page 25... ...
personnel -- both military and civilian -- in the combat zone were required to wear protective vests containing hard body armor plates. Currently, there are two major types of personal body armor, soft and hard.
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From page 26... ...
. Fiber and Resin Composites in Helmets Like body armor, current ballistic protective helmets employ a passive momentum defeat mechanism in which a bullet with a small mass and high velocity progressively engages a larger mass of high-performance fiber/resin composite, decreasing the bullet velocity and locally transferring momentum to the helmet.
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From page 27... ...
Armor testing therefore has implicit goals of ensuring that body armor meets survivability standards while allowing sufficient soldier mobility and flexibility. To provide soldiers with more weight than necessary to defeat a specified threat can lead to unintended consequences such as premature exhaustion and restricted ability to move rapidly and react appropriately in lifethreatening situations (NRC, 2010)
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From page 28... ...
Since the original Prather effort, a number of studies and experiments have been conducted to better determine the relationships among blunt force trauma, human injury, and body armor testing processes. Even though there is no correlation between medical data and the BFD approach, the committee believes that the current methodology for testing body armor should be continued until it is replaced by a better methodology.
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From page 29... ...
SOURCE: Richard Sayre, Deputy Director, Office of the Secretary of Defense, Director of Operational Test and Evaluation (OSD DOT&E) Live Fire Test and Evaluation, and Tracy Sheppard, Executive Officer and Staff Specialist, OSD DOT&E Live Fire Test and Evaluation, "DoD In-Brief to the National Research Council Study Team," presentation to the Body Armor Testing Phase I committee, Aberdeen, Maryland, November 30, 2009.
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From page 30... ...
SOURCE: Richard Sayre, Deputy Director, Office of the Secretary of Defense, Director of Operational Test and Evaluation (OSD DOT&E) , Live Fire Test and Evaluation, and Tracy Sheppard, Executive Officer and Staff Specialist, OSD DOT&E Live Fire Test and Evaluation, "DoD In-Brief to the National Research Council Study Team," presentation to the Body Armor Testing Phase I committee, Aberdeen, Maryland, November 30, 2009.
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From page 31... ...
; the new DOT&E protocol requires that the 90 percent BFD upper tolerance limit be less than 44 mm with 90 percent confidence for the first shot and with 80 percent confidence for the second shot. 9 James Zheng, Chief Scientist, PEO Soldier, "Ballistic Protection for Warfighters," presentation to the Body Armor Testing Phase I committee, Aberdeen, Maryland, November 30, 2009.
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. In the report, the GAO recommended that "the Army should provide for an independent ballistics evaluation of the First Article Testing results," that "the Army should assess the need to change its procedures based on the outcome of the independent experts' review and document these and all other key decisions made to clarify or change the testing protocols," and that "the Army provide for an independent external peer review of ATC's body armor testing protocol, facilities and instrumentation" (GAO, 2009, p.
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10 2-210: Ballistic testing of hard body armor using clay backing. Aberdeen Proving Ground, Md.: Aberdeen Test Center.
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