Accession Number : ADA314462

Title :   Cavity Expansion Analysis of Brittle Materials.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY

Personal Author(s) : Satapathy, Sikhanda ; Bless, Stephan

PDF Url : ADA314462

Report Date : JUL 1995

Pagination or Media Count : 17

Abstract : In this report, we show that the target resistance of brittle materials can be calculated accurately using spherical cavity expansion analysis and a conventional brittle material model. The stress field ahead of the tip of the penetrator is assumed to have spherical symmetry. The brittle material is modeled as an elastic material which cracks under tension. The cracked material is considered to be pulverized when it fails in compression, which is then characterized as a Mohr-Coulomb material with pressure dependent shear strength. The target resistance value found from this analysis compares well with the reported experimental values for AD995 alumina (Al2O3).

Descriptors :   *STRESS ANALYSIS, *CERAMIC MATERIALS, *CRACK PROPAGATION, *BRITTLENESS, STRESS STRAIN RELATIONS, TENSILE STRENGTH, DEFORMATION, MODULUS OF ELASTICITY, CAVITIES, IMPACT STRENGTH, PENETRATION, ALUMINUM OXIDES, SHEAR STRESSES, TENSION, COMPRESSIVE STRENGTH, STATIC PRESSURE, TARGET STRENGTH, RADIAL STRESS, SHEAR STRENGTH, STRESS CONCENTRATION.

Subject Categories : Ceramics, Refractories and Glass
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE