Accession Number : ADA321078

Title :   Dynamic Behavior of Brittle Materials.

Descriptive Note : Final rept.,

Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA CENTER OF EXCELLENCE FOR ADVANCED MATERIAL S

Personal Author(s) : Nemat-Nasser, Sia

PDF Url : ADA321078

Report Date : 12 JAN 1997

Pagination or Media Count : 9

Abstract : The program focused on a fundamental study of the dynamic response and failure modes of a broad class of conventional and advanced brittle materials. The initial five-year research program addressed materials of current interest to the Army (titanium diboride, titanium carbide, alumina silicon carbide, aluminum, nitride, zirconia, and silicon nitride), as well as novel materials and concepts (nanocrystalline ceramics, laminated and fiber reinforced ceramic composites, functionally graded materials). However, only funding of the first year and partial funding of the second year were received. Hence, limited specific programs were developed in a multi-disciplinary mode, encompassing experimental, analytical, and microstructural characterization components. Through testing and analysis, physically-based constitutive models were developed.

Descriptors :   *STRAIN RATE, *CERAMIC MATERIALS, VISCOPLASTICITY, MICROSTRUCTURE, LAMINATES, DYNAMIC RESPONSE, FIBER REINFORCED COMPOSITES, BRITTLENESS, DUCTILE BRITTLE TRANSITION, PENETRATION, ALUMINUM OXIDES, SHEAR STRESSES, FAILURE(MECHANICS), SILICON CARBIDES, TITANIUM BORIDE, PLASTIC FLOW, ZIRCONIUM OXIDES, SILICON NITRIDES, MICROCRACKING.

Subject Categories : Ceramics, Refractories and Glass
      Mechanics
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE