Comprises papers at the improvement and incorporation of ceramic fabrics for armor functions. issues comprise influence and penetration modeling, dynamic and static trying out to foretell functionality, harm characterization, non-destructive review and novel fabric concepts.Content:
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Includes papers at the improvement and incorporation of ceramic fabrics for armor functions. issues contain influence and penetration modeling, dynamic and static trying out to foretell functionality, harm characterization, non-destructive overview and novel fabric strategies. content material:
This publication provides contemporary and leading edge advances in our figuring out of key facets of the reaction of fabrics less than severe rather a lot that happen in the course of excessive speed effect and penetration. the point of interest of the content material is at the a number of demanding situations linked to characterization and modeling of advanced interactions that take place in the course of those hugely dynamic occasions.
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Extra resources for Ceramic Armor and Armor Systems II, Volume 178
5). The liquid droplet quench testing was performed at Raytheon's test facilities in Tucson, AZ. using the methods and parameters that were established for sapphire domes of the same geometry. ALON domes were heated to a uniform temperature of 150°C and water spray quenched on the concave surface to room temperature using a water temperature of 25°C. All three domes survived this test. Testing of additional ALON domes is currently is process and predictive models of the thermal stresses generated during the quench testing are being refined using the newly measured temperature dependent thermal properties of ALON.
The non-linear and highly dynamic phase change occurring as jets of water are impinged on the dome make analysis of the thermal contour and resulting stress field nearly impossible. It is only with the aid of experimental measurement using IR cameras and carefully time mapping individual elements that a relation between quench temperatures and peak dome stress can be ascertained. While this is a rather laborious technique requiring extensive testing the test has been verified using sapphire domes having the same geometry as the ALON domes that were tested recently.
Thermal Expansion values are slightly higher than previously reported and these new measurements extend the temperature range to include temperatures from -150°C to 800°C. A greater number of points were measured on the specific heat vs. temperature curve and the temperature range of the measurements was extended to include points below 0°C to -50°C. Table VI: Thermal Properties of Transparent ALON Measured at TRPL (2004) Temp. 0 ^. 0113 6 -100 100 300 500 700 900 1100 Temperature (°C) Figure 7: Thermal Conductivity of ALON - Comparison with Historical Data 28 Ceramic Armor and Armor Systems II 200 400 600 Temperature (°C) 800 1000 Figure 8: Specific Heat of ALON-Comparison with Historical Data - Mean CTE (SURDAT) - Mean CTE (SOR11988) - Mean CTE (TPRL 2004) -200 0 200 400 600 Temperature (°C) 800 1000 Figure 9: Thermal Expansion Coefficient of ALON-Comparison with Historical Data The thermal shock figure (500°C) of merit, R' of ALON is compared to three other IR dome materials in Table VII.