Cavity Expansion Analysis of Brittle Materials.

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).

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1995
Accession Number
ADA314462

Entities

People

  • Sikhanda Satapathy
  • Stephan Bless

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • C4I
  • Counter IED

DTIC Thesaurus Topics

  • Boundaries
  • Coefficients
  • Compressive Strength
  • Elastic Materials
  • Equations
  • Materials
  • Measurement
  • Mechanics
  • Military Research
  • Radial Stress
  • Resistance
  • Shear Strength
  • Shear Stresses
  • Stress Strain Relations
  • Stresses
  • Symmetry
  • Tensile Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • ballistics.