A Probabilistic Model of Brittle Crack Formation

Abstract

Multiple experience on macroscopically identical 3D carbon-carbon (C/ C) composite specimens show that the fracture behavior displays the main features of a stochastic process which reflects the random nature of the strength field. The critical load is random and a sample set of crack trajectories displays a Poisson's type diffuse character. Crack trajectories are unique for each individual experiment (no two coincide). The crack appears to propagate stepwise (a sequence of local failures) through a random field of defects which is constrained by the orthotropic architecture of the yarn bundles. Keywords: Carbon carbon composite.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1988
Accession Number
ADA198203

Entities

People

  • A. Chudnovsky
  • A. Moet
  • B. Kunin
  • D. Dearth
  • H. Aglan

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carbon Carbon Composites
  • Civil Engineering
  • Composite Materials
  • Crack Propagation
  • Cracks
  • Diffusion Coefficient
  • Engineering
  • Equations
  • Fracture (Mechanics)
  • Materials
  • Mechanics
  • Probabilistic Models
  • Probability
  • Probability Distributions
  • Random Variables
  • Stochastic Processes
  • Three Dimensional

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials