Materials Material Science

Advances in Ceramic Armor VII: Ceramic Engineering and by Swab, Sujanto Widjaja, Dileep Singh

By Swab, Sujanto Widjaja, Dileep Singh

This booklet is a set of papers from the yankee Ceramic Society's thirty fifth foreign convention on complicated Ceramics and Composites, held in Daytona seashore, Florida, January 23-28, 2011. This factor contains papers offered within the Armor Ceramics Symposium on subject matters akin to production; High-Rate Real-Time Characterization; Microstructural layout; Nondestructive Characterization; and Phenomenology and Mechanics of Ceramics Subjected to Ballistic Impact.


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Extra info for Advances in Ceramic Armor VII: Ceramic Engineering and Science Proceedings, Volume 32

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The final result of this study not only confirmed the viability of the hole drilling method, but the existence of positive residual stresses in all four tile configurations tested. The residual stresses were also found to vary in magnitude based on tile thickness. A mathematical relationship has been derived to describe the relationship. The impact positive (tensile) residual stresses could have on component performance has also been discussed in terms of a safety factor. INTRODUCTION Today it is well known that common manufacturing processes can induce residual stresses in engineered components.

Probability of non-penetration, in this NATO specification is 90% so the shot spacing occurring 10% of the time was selected as the multi-hit requirement. This shot spacing when tested as required by the NATO specification to "exploit the Localized Weak Areas" of the transparent armor (shooting at the edges with a minimum spacing of 25 mm) causes the glass to be made very thick. When the TACOM ATPD 2352 specification was written the multi-hit shot spacing for rifle/machine gun threats was increased.

Sun exposure weathering tests require the use of Procedure II in MIL-STD-810 Method 505. This procedure was developed to include both the temperature and actinic effects of solar loads. The specified cycle is 20 out of 24 hours at 1120W/m at a constant temperature of 49°C. For four hours each cycle the lights are turned off to induce alternating thermal stressing and allow "dark" processes to occur. The most intense naturally occurring total irradiance on the earth at sea level is represented by the irradiance cycles of Procedure I, which only reach 1120W/m2 for 2 hours out of each 24 hours.

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