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Suggested Citation:"APPENDIX 1." National Research Council. 2010. Testing of Body Armor Materials for Use by the U.S. Army—Phase II: Letter Report. Washington, DC: The National Academies Press. doi: 10.17226/12885.
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APPENDIX 1

The high-speed photographic camera used at by R.F. Kinsler at the Army Research Laboratory is frequently operated with a repetition rate of 25 microseconds, a pulse duration of 1 microsecond, and a recording array of 304 by 192 pixels. This would yield a spatial resolution at a moving deformation front of 0.26 mm.1 For a BFD displacement rate of 100 m/s, the surface will move by only 0.1 mm during the 1 microsecond that the “shutter” is open, producing a small smear of the 0.26 mm spatial resolution.

A BFD of 40 mm would occur over approximately 1 millisecond. A repetition rate of 25 microseconds would therefore enable about 40 discrete contours of deformation to be recorded during a given shot with a spatial resolution of 0.26 mm and a velocity resolution of about 1 m/s.

1

Question and answer session between R. Kinsler, ARL, and the committee, March 10, 2010.

Suggested Citation:"APPENDIX 1." National Research Council. 2010. Testing of Body Armor Materials for Use by the U.S. Army—Phase II: Letter Report. Washington, DC: The National Academies Press. doi: 10.17226/12885.
×
Suggested Citation:"APPENDIX 1." National Research Council. 2010. Testing of Body Armor Materials for Use by the U.S. Army—Phase II: Letter Report. Washington, DC: The National Academies Press. doi: 10.17226/12885.
×
Page 48
Suggested Citation:"APPENDIX 1." National Research Council. 2010. Testing of Body Armor Materials for Use by the U.S. Army—Phase II: Letter Report. Washington, DC: The National Academies Press. doi: 10.17226/12885.
×
Page 49
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Testing of Body Armor Materials for Use by the U.S. Army—Phase II: Letter Report Get This Book
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This report assesses the methodologies used for body armor testing. This Phase II report considers in greater detail [than in Phase I] the validity of using the column drop performance test described by the Army for assessing the part-to-part consistency of a clay body within the level of precision that is identified by the Army test procedures. More detailed evaluations of the array of issues surrounding body armor testing, both present and future, will be presented in the final Phase III report.

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