Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Hypervelocity Penetration of Tungsten Alloy Rods into Ceramic Tiles: Experiments and 2-D Simulations

Eindringen von Stäben aus Wolframsinterlegierung in Keramiken bei hohen Geschwindigkeiten: Experimente und 2-D-Simulationen
 
: Rosenberg, Z.; Dekel, E.; Hohler, V.; Stilp, A.J.; Weber, K.

:

International Journal of Impact Engineering 20 (1997), S.675-683
ISSN: 0734-743X
Englisch
Zeitschriftenaufsatz
Fraunhofer EMI ()
2-D Simulationen; 2-D simulations; alumina tiles; confined ceramics; depth-of-penetration; differential ballistic efficiency factor; differentieller ballistischer Effektivitätsfaktor; DOP; Eindringvorgang; einzelner freier Parameter; Endballistik-Experimente; failure criterion; flash X-ray shadowgraphs; impact velocity influence; Impaktgeschwindigkeitseinfluß; Johnson-Holmquist model; Johnson-Holmquist-Modell; Kacheldickeneinfluß; langes Stabprojektil; lateral confinement; lateral dimensions; lateral release waves; laterale Entlastungswellen; long rod penetrator; penetration process; PISCES 2-D ELK code; Querabmessungen; Resteindringung; Röntgenblitzaufnahmen; seitlich Verdämmung; single free parameter; Stahlverdämmung (Keramik-Rückseite); steel backing; terminal ballistic experiments; tile thickness influence; tungsten alloy penetrator; verdämmte Keramik; Versagenskriterium; Woframsinterpenetrator

Abstract
A series of terminal ballistics experiments and 2-D simulations, with small scale tungsten alloy penetrators, was performed in order to quantify the ballistic efficiency of confined ceramic tiles. The data includes both depth of penetration (DOP), into thick steel backing and X-ray shadowgraphs during the penetration process. Impact velocities ranged between 1.25 to 3.0 km/s. The size of the tiles varied in order to check their performance as a function of thickness and lateral dimensions. We found that the differential ballistic efficiency of alumina tiles is practically independent on impact velocity and tile thickness, within the ranges of velocity and thicknesses, investigated here. A detailed simulation study , using the Eulerian processor of the PISCES 2-D ELK code, was performed in order to better understand the interaction between long-rods and ceramic tiles, and particularly, to adjust a proper failure criterion to the tiles. We found that a simple version of the Johnson- Holm quist model, with a single parameter, is fairly adequate to account for most of the data. These include: lateral confinement, tile thickness and impact velocity influence on the penetration depth. We used the code to further investigate the influence of lateral dimensions on tile performance.

: http://publica.fraunhofer.de/dokumente/PX-17688.html