Thermodynamic of Brittle Fracture

Abstract

This report outlines the results of the effort to suggest a theoretical method of describing brittle ceramic armor. We analyze thermodynamics and kinetics of brittle fracture by combining the Gibbs approach to the study of heterogeneous thermodynamic systems, the Griffith energetic criterion for crack growth, and the Onsager irreversible thermodynamics. The central object of the study is the exchange between accumulated elastic energy and "chemical" energy accumulated in cohesive bonds of material particles. One of the main thrusts of the research is development of a continuum model describing dwell-defeat transition for a metallic projectile hitting ceramic armor. As compared with known theories of fracture, we describe the morphology of the damaged zone. This makes our approach somewhat similar to the Gibbs theory of heterogeneous systems.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2005
Accession Number
ADA441025

Entities

People

  • Michael A. Grinfeld
  • Tim W. Wright

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ceramic Materials
  • Chemical Bonds
  • Department Of Defense
  • Elastic Properties
  • Equations
  • Information Operations
  • Kinetics
  • Materials
  • Military Research
  • Phase
  • Phase Transformations
  • Physics
  • Shear Modulus
  • Thermodynamics
  • Transitions
  • Weapons

Readers

  • Explosive Engineering.
  • Materials Science (Mechanical Engineering).
  • Theoretical Analysis.