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003 OCoLC;

005 20141212070703.0;

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007 cr cn|||||||||;

008 110214s2010 mdua ob f000 0 eng d;

029 0 a| DTICEb| ADA528245;

035 a| (Sirsi) o713342576;

040 a| DTICEc| DTICEd| GPOd| UtOrBLW;

049 a| ERE#;

074 a| 0324-A-01 (online);

086 0 a| D 101.133:5303;

245 00 a| Quantitative gap measurement in ceramic armor arrays /c| Seth Ghiorse [and others].;

260 a| Aberdeen Proving Ground, MD :b| Army Research Laboratory,c| [2010];

300 a| 1 online resource (v, 32 pages) :b| illustrations (some color).;

336 a| text2| rdacontent;

337 a| computer2| rdamedia;

338 a| online resource2| rdacarrier;

490 1 a| ARL-TR ;v| 5303;

500 a| Title from title screen (viewed June 28, 2011).;

500 a| Performing organization: U.S. Army Research Laboratory.;

513 a| Final rept;b| 1 Oct 2009 - 31 May 2010.;

504 a| Includes bibliographical references.;

506 a| APPROVED FOR PUBLIC RELEASE.;

520 a| In order to reduce weight while maintaining ballistic performance, modern armored vehicles often use ceramic-based armor solutions. Ceramic solutions are typically made of a close-fitting periodic array of ceramic tiles, maintaining a specific gap dimension between the tiles. The gap separation distance is critical to the ballistic performance of the system and it is important to have a reliable means of quantitative inspection. This report presents results of a study of a non-destructive quantitative X-ray gap width measurement method commonly used to measure and inspect array gaps. It was found that this X-ray method gives a good portrayal of array quality and gap widths, but that gap measurement accuracy likely can be improved. The X-ray method was found to skew gap width measurements higher, between 2 and 20%, and was dependent on image blur. An X-ray system designed specifically for gap measurement will significantly improve measurement accuracy. Obtaining such a system is recommended, with digital X-ray radiography being the preferred path forward.;

650 17 a| Coatings, colorants and finishes.2| scgdst;

650 27 a| Combat vehicles.2| scgdst;

650 27 a| Nuclear physics & elementary particle physics.2| scgdst;

650 17 a| Ceramic materials.2| dtict;

650 17 a| Armored vehicles.2| dtict;

650 17 a| X rays.2| dtict;

650 27 a| Arrays.2| scgdst;

650 27 a| Accuracy.2| scgdst;

650 27 a| Radiography.2| scgdst;

650 27 a| Tiles.2| scgdst;

650 27 a| Armor.2| scgdst;

650 27 a| Inspection.2| scgdst;

650 27 a| Ballistics.2| scgdst;

650 27 a| Measurement.2| scgdst;

650 27 a| Digital systems.2| scgdst;

650 27 a| Quality.2| scgdst;

650 0 a| Armored vehicles, Militaryx| Protection.=| ^A906505;

650 0 a| Reactive armor tiles.=| ^A1056994;

650 0 a| Ceramic materialsx| Nondestructive testing.=| ^A31424;

650 0 a| Armor-platex| Materialsx| Nondestructive testing.=| ^A269273;

653 2 a| CERAMIC ARRAY;

700 1 a| Ghiorse, Seth.?| UNAUTHORIZED;

710 2 a| U.S. Army Research Laboratory.=| ^A367731;

830 0 a| ARL-TR (Aberdeen Proving Ground, Md.) ;v| 5303.=| ^A566074;

856 40 u| https://purl.fdlp.gov/GPO/gpo9236;

949 a| Click on web addressw| ASISh| JOYNER94;

998 a| 2530273;

998 a| u2530273;

596 a| 1;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 2530273-1001l| JNETm| JOYNERr| Ys| Yt| JNE1DOu| 8/23/2011x| EDOCUMENTz| JERESOURCE;

Quantitative gap measurement in ceramic armor arrays / Seth Ghiorse [and others].

Other author	Ghiorse, Seth.
Other author	U.S. Army Research Laboratory.
Format	Electronic
Publication Info	Aberdeen Proving Ground, MD : Army Research Laboratory, [2010]
Description	1 online resource (v, 32 pages) : illustrations (some color).
Supplemental Content	https://purl.fdlp.gov/GPO/gpo9236
Subjects	Armored vehicles, Military--Protection. Reactive armor tiles. Ceramic materials--Nondestructive testing. Armor-plate--Materials. --Nondestructive testing.

Series	ARL-TR ; 5303 ARL-TR (Aberdeen Proving Ground, Md.) ; 5303. ^A566074
Abstract	In order to reduce weight while maintaining ballistic performance, modern armored vehicles often use ceramic-based armor solutions. Ceramic solutions are typically made of a close-fitting periodic array of ceramic tiles, maintaining a specific gap dimension between the tiles. The gap separation distance is critical to the ballistic performance of the system and it is important to have a reliable means of quantitative inspection. This report presents results of a study of a non-destructive quantitative X-ray gap width measurement method commonly used to measure and inspect array gaps. It was found that this X-ray method gives a good portrayal of array quality and gap widths, but that gap measurement accuracy likely can be improved. The X-ray method was found to skew gap width measurements higher, between 2 and 20%, and was dependent on image blur. An X-ray system designed specifically for gap measurement will significantly improve measurement accuracy. Obtaining such a system is recommended, with digital X-ray radiography being the preferred path forward.
General note	Title from title screen (viewed June 28, 2011).
General note	Performing organization: U.S. Army Research Laboratory.
Bibliography note	Includes bibliographical references.
Access restriction	APPROVED FOR PUBLIC RELEASE.
Report note	Final rept; 1 Oct 2009 - 31 May 2010.
GPO item number	0324-A-01 (online)
Govt. docs number	D 101.133:5303

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Quantitative gap measurement in ceramic armor arrays / Seth Ghiorse [and others].

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