Accession Number : ADA582115


Title :   Multiscale Modeling of Non-crystalline Ceramics (Glass)


Descriptive Note : Final rept. Apr 2010-Nov 2012


Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE


Personal Author(s) : Gazonas, George A ; McCauley, James W ; Batyrev, Iskander G ; Becker, Richard C ; Izvekov, Sergei ; Jenkins, Timothy A ; Patel, Parimal ; Rice, Betsy M ; Schuster, Brian E ; Weingarten, N S ; Wildman, Raymond A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a582115.pdf


Report Date : Mar 2013


Pagination or Media Count : 128


Abstract : This third-year final report describes results on the multiscale modeling of noncrystalline ceramics (glass) funded from the Director's Strategic Initiative (DSI) in support of the U.S. Army Research Laboratory's (ARL) Strategic Research Initiative. The long-term research goal of the program is to develop a concurrent multiscale computational finite element code for optimizing or enhancing the performance of various glasses against ballistic threats; the initial work focuses on pure fused-silica (a-SiO2) and chemically varied a-SiO2 materials. As such, this objective falls squarely within the purview of the Weapons and Materials Research Directorate, since multiscale models are constitutive models (specific to a particular material) wherein time-evolving short- and intermediate-range atomic structure, order, and microcrack initiation and growth are fully coupled to the macroscale, a phenomenon that cannot be modeled or accounted for using classical homogenization methods. A more immediate research objective is to understand why certain chemically substituted a-SiO2 materials exhibit enhanced performance when defeating shaped-charge jets and other ballistic threats.


Descriptors :   *FUSED SILICA , BALLISTICS , COMPUTERIZED SIMULATION , MOLECULAR DYNAMICS , SHAPED CHARGE JETS


Subject Categories : Ceramics, Refractories and Glass
      Ballistics


Distribution Statement : APPROVED FOR PUBLIC RELEASE